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Before 2000, many successful natural gas wells had been completed in the Marcellus. The yields of these wells were often unimpressive upon completion. However, many of these older wells in the Marcellus have a sustained production that decreases slowly over time. Many of them continued to produce gas for decades. A patient investor might make a profit from these low yield wells with slowly declining production rates.

For new wells drilled with the new horizontal drilling and hydraulic fracturing technologies the initial production can be much higher than what was seen in the old wells. Early production rates from some of the new wells has been over one million cubic feet of natural gas per day. The technology is so new that long term production data is not available. As with most gas wells, production rates will decline over time, however, a second hydraulic fracturing treatment could restimulate production.
Copyright: Geology.com

Cabot Oil & Gas Corp. denies the allegation and said it has evidence to back its position.

By Steve Mocarskysmocarsky@timesleader.com
Staff Writer

DIMOCK TWP. – The state is alleging an energy company is responsible for contamination of a water well, a spring and wetlands after a black fluid was discovered recently near a Marcellus Shale drilling site in Susquehanna County.

The company denies responsibility.

The state Department of Environmental Protection on Thursday sent a notice informing Cabot Oil & Gas Corp. that violations of the state Clean Streams Law, the Oil & Gas Act and the Solid Waste Management Act were documented on site visits near the A&M Hibbard well pad on March 22-24.

The visits were the result of a phone report from Cabot of the presence of a black fluid in a ditch near the site on March 21.

“The investigation revealed that black fluid originating on the … drill pad was not properly contained in a pit or tank (and that the fluid) entered a hand dug well and a spring near the location, as well as a wetland downgradient of the spring,” the notice states.

“We believe it was waste from their drill pit,” DEP spokesman Dan Spadoni said Thursday.

He said he doesn’t think anyone was using the spring for drinking water, and the well was used only as “a back-up” water supply by the property owner.

Cabot has 10 days to provide the cause(s) of the incident, when the violations were or will be corrected, the steps taken to prevent their recurrence and documentation of clean-up activities.

DEP also asked Cabot to investigate the condition of the drill pit and liner and “strongly recommends that the liner and (drill) cuttings be removed from the pit and properly disposed of prior to restoration of the site.” The department also requested notification after all cuttings and fluid are removed from the pit so DEP can inspect the liner.

Cabot spokesman Ken Komoroski said the company has not confirmed the source of the fluid, but has confirmed that “Cabot activities are not the source.”

Komoroski said Cabot checked with its “independent third-party consultant,” which concluded that “the observance of black water in the well did not and could not have occurred as a result of Cabot activities” based on “observation and extensive analytical testing.” He said the well and spring contained “total and fecal coliform, which is indicative of human or animal waste” and that “the materials that exist in the well in high concentrations don’t exist on Cabot locations.”

Asked if any of the materials Cabot uses were found in the well, Komoroski said the company does not yet have all analytical results from lab tests and a final report is still in draft form. DEP continues to investigate the incident and Cabot will continue to cooperate and support the department’s efforts, he said.

The Clean Streams Law and Solid Waste Management Act provide for civil penalties and criminal fines ranging from a maximum of $10,000 per day to a maximum of $25,000 per day for each violation. Each day of continued violation constitutes a separate offense.

Copyright: Times Leader

House committee members hear testimony on impact of gas drilling, proposed environmental safeguards.

By Steve Mocarskysmocarsky@timesleader.com
Staff Writer

KINGSTON TWP. – Members of the state House of Representatives Environmental Resources and Energy Committee came to the Back Mountain on Wednesday to hear testimony on the impact of Marcellus Shale drilling and proposed legislation that would put additional environmental safeguards in place.

Testifying were representatives of two environmental groups, a local physician active in environmental issues and a resident of Dimock Township, Susquehanna County, where the state Department of Environmental Protection ordered a gas company to provide drinking water to residents after their wells were contaminated by methane.

State Rep. Camille “Bud” George, committee majority chairman, said the committee convened at the township municipal building at the invitation of state Rep. Phyllis Mundy, D-Kingston.

Mundy said she requested the hearing because she and many of her constituents “have serious concerns about the potential impact of Marcellus Shale drilling on our streams, our land and especially our drinking water,” noting that a proposed well site is less than two miles from the Huntsville and Ceasetown reservoirs.

Noting the contamination of drinking water in Dimock Township and a recent drilling-related mud spill in Clinton County, Mundy said there was “still time to put safeguards in place to protect the environment and the public health from the negative impacts” of gas drilling.

“That is why I strongly support Chairman George’s House Bill 2213, the Land and Water Protection Act, which would, among other things, require state inspections of well sites during each drilling phase and require full disclosure of the chemicals used in hydraulic fracturing,” she said.

The act would also:

• Extend from 1,000 feet to 2,500 feet the presumed liability of a gas well polluting a water supply.

• Update bonding requirements to cover the costs of decommissioning a well from a $2,500 bond to a $150,000 bond for a Marcellus Shale well and to a $12,000 bond for all other wells.

• Reaffirm that local government may regulate aspects of drilling within traditional powers, such as hours of operation.

Jeff Schmidt, Sierra Club state chapter director, said the club supports the bill and suggested adding some provisions:

• Require a drilling permit applicant to publish in a local newspaper and in the Pennsylvania Bulletin that a permit application was submitted to DEP.

• Require that erosion and sediment control and storm water discharge plans for drill sites be as stringent as requirements for all other earth disturbance activities, and require DEP to offer county conservation districts the opportunity to review those plans and fund the work.

Brady Russell, Eastern Pennsylvania director for Clean Water Action, said the gas industry will “cut corners” if not properly supervised. He made several recommendations, including requiring an inspector – or eco-cop – on each drill site to make sure drillers follow approved plans.

He also suggested requiring drillers to pay for pre- and post-drilling testing of nearby water sources.

Dr. Thomas Jiunta, a podiatrist from Lehman Township, where issuance of a drilling permit is expected to be approved next week, said that since he has been researching Marcellus Shale exploration, he has “gotten a lot of lip service from senators and representatives about how we need to do it right. Before I start, I just want to say that maybe, maybe – and this is the first time I’ve said this word – we need a moratorium to stop it until we get it right.”

Audience members burst into applause and cheers at Jiunta’s suggestion.

After sharing his concerns about an inadequate number of treatment plants capable of removing hazardous chemicals from water used in hydraulic fracturing and risks associated with storing those chemicals underground, Jiunta made several suggestions for the bill.

One is adding a requirement that recovered waste water from the fracturing process be stored in sealed tanks rather than in surface pits that have liners that he said could tear and overflow with heavy rain.

Dimock Township resident Victoria Switzer testified first that a gas company “landman” talked her and her “misinformed, uninformed and na�ve” family into leasing their land for $25 an acre and a 12.5-percent royalty minus transportation cost.

“We now sit in the middle of 63 natural gas wells. In spite of what has gone terribly wrong here, the 2010 plan calls for a doubling of their efforts,” Switzer said.

She said gas drilling has resulted in diminished or contaminated drinking water supplies, destruction of roads and bridges, increased traffic beyond road capacity; decreased air quality, loss of aesthetics and more.

Mundy said she can’t imagine what Switzer is going through.

“How do you like less government – fewer DEP employees, lower taxes, no severance tax? This is what we’ve got; let’s fix it,” Mundy said.

State Rep. Tim Seip, D-Pottsville, said a severance tax on gas extraction is necessary to fund more inspectors and conservation district work. He said the public should lobby their state senators to adopt the bill when it comes before them.

Asked if he thought a moratorium was possible in Pennsylvania, George said he thought, “It’s really going to help Pennsylvania if every place where there’s drilling we get this type of attention.”

Copyright: Times Leader

Horizontal Drilling to Penetrate More Fractures

The fractures (also known as “joints”) in the Marcellus Shale are vertical. So, a vertical borehole would be expected to intersect very few of them. However, a horizontal well, drilled perpendicular to the most common fracture orientation should intersect a maximum number of fractures.

High yield wells in the Marcellus Shale have been built using the horizontal drilling technique. Some horizontal wells in the Marcellus Shale have initial flows that suggest that they are capable of yielding millions of cubic feet of gas per day, making them some of the most productive gas wells in the eastern United States. Although some experts are very optimistic on the long-term production rates of these wells, it is too early to determine their productive life or long-term yield.

A second method is used to increase the productivity of a well. That is to increase the number of fractures in a well using a technique known as “hydraulic fracturing” or “hydrofracing”. This method uses high-pressure water or a gel to induce fractures in the rock surrounding the well bore.

Hydrofracing is done by sealing off a portion of the well and injecting water or gel under very high pressure into the isolated portion of the hole. The high pressure fractures the rock and pushes the fractures open.

To prevent the fractures from closing when the pressure is reduced several tons of sand or other “propant” is pumped down the well and into the pressurized portion of the hole. When the fracturing occurs millions of sand grains are forced into the fractures. If enough sand grains are trapped in the fracture it will be propped partially open when the pressure is reduced. This provides an improved permeability for the flow of gas to the well.

Copyright: Geology.com

Both vertical and horizontal wells are used in shale gas drilling and completion; however, horizontal wells are the increasing trend due to both environmental concerns and economic efficiency (DOE, 2009). Horizontal drilling allows more exposure within the formation to optimize capture of natural gas as well as reducing the environmental footprint of drilling activity (DOE, 2009). The United States Department of Energy’s recently released document on shale gas development in the United States explains that “a vertical well may be exposed to as little as 50 ft of formation while a horizontal well may have a lateral wellbore extending in length from 2,000 to 6,000 ft within the 50-300 ft thick formation” (DOE, 2009, p.47). As such, surface disturbance and impacts to wildlife and communities are reduced while providing optimal gas recovery; considering 16 vertical wells per 640-acre section of land would disturb 77 acres, the equivalent in horizontal wells (4- horizontal wells) would disturb approximately 7.4 acres (DOE, 2009). In addition to reductions in surface disturbance, horizontal wells allow for development in areas previously considered unavailable, primarily urban and environmentally sensitive or protected areas. Well pads can be located away, or ‘setback’, from residences, roadways, wildlife habitats and other protected areas without hampering access to available gas reserves.

In order to recover the shale gas after drilling a well, current industry practice is to hydraulic fracture the formation to stimulate the near wellbore area and facilitate the release of natural gas trapped within the shale. Hydraulic fracturing is a process whereby a fracturing fluid, primarily water, is pumped into the formation under pressure at a calculated rate to form fractures and cracks within the formation, providing a pathway for the gas to migrate to the wellhead for recovery. Sand or other granular materials are added to the fracturing fluid to help ‘prop’ open the newly created fractures after the fluid has been removed from the formation (ALL, 2008a). Additional chemicals may be added to the fracturing fluid for specific engineering purposes; these additions may include friction-reducing agents, biocides and various stabilizers to prevent corrosion of metal piping in the well (DOE, 2009; ALL, 2008a). Depending on the formation and well characteristics, multiple fracturing procedures may be performed in order to fully develop the well for gas recovery (DOE, 2009). While each well and geologic formation is unique, continuing advances in horizontal drilling and well completion practices provide additional reductions in environmental impacts from oil and gas activities while providing the nation’s critical energy supply.
Copyright: GoMarcellusshale.com

Environmental Resources and Energy hearing Wednesday at Kingston Township building.

By Steve Mocarskysmocarsky@timesleader.com
Staff Writer

KINGSTON TWP. – Several people with concerns about natural gas drilling in Pennsylvania – and especially in the Back Mountain – are scheduled to testify Wednesday at a public hearing before a state House of Representatives committee.

State Rep. Phyllis Mundy requested and is hosting a hearing of the House Environmental Resources and Energy Committee at the Kingston Township Municipal Building from 1 to 3 p.m.

Mundy, D-Kingston, said she has “grave concerns” that there are inadequate protections in place to protect the environment from drilling associated with the Marcellus Shale formation.

“I don’t think we’re going to be able to stop Marcellus Shale drilling, but we need to make sure it doesn’t leave a legacy like that of coal. An ounce of prevention is worth a pound of cure,” Mundy said on Monday.

She said she believes a proposed drilling site in Lehman Township is “much too close” to the Huntsville and Ceasetown reservoirs, which provide drinking water to many of her constituents.

Committee Majority Chairman Camille “Bud” George notes in a press release that the state Department of Environmental Protection issued more than 1,300 drilling permits in 2009 and more are expected in coming years, yet no study exists on the environmental or human health impacts of gas development in Pennsylvania.

Testimony will be presented about mitigating environmental risks and House Bill 2213 – the Land and Water protection Act introduced by George, D-Clearfield County.

The bill would:

• Require state inspections of wells during each drilling phase.

• Extend to 2,500 feet the presumed liability of a well polluting a water supply; the current radius is 1,000 feet.

• Require full disclosure of chemicals used in the hydraulic fracturing of the gas.

• Update bonding requirements to cover the costs of decommissioning a well. Current regulations call for a $2,500 bond, but the cost to cap a well could range from $12,000 to $150,000 for a deep well, according to George.

Scheduled to testify are Dr. Thomas Jiunta, a local podiatric physician active in environmental causes; Dr. Gere Reisinger, a physician whose 200-acre farm in Wyoming County has been affected by drilling; Victoria Switzer, whose water at her home in Dimock, Susquehanna County, was contaminated after nearby drilling; Brady Russell, eastern Pennsylvania director, Clean Water Action; and Jeff Schmidt, senior director, Sierra Club, Pennsylvania Chapter.

Copyright: Times Leader

Throughout most of its extent, the Marcellus is nearly a mile or more below the surface. These great depths make the Marcellus Formation a very expensive target. Successful wells must yield large volumes of gas to pay for the drilling costs that can easily exceed a million dollars for a traditional vertical well and much more for a horizontal well with hydraulic fracturing.

And rock units are not homogeneous. The gas in the Marcellus Shale is a result of its contained organic content. Logic therefore suggests that the more organic material there is contained in the rock the greater its ability to yield gas. John Harper of the Pennsylvania Geological Survey suggests that the areas with the greatest production potential might be where the net thickness of organic-rich shale within the Marcellus Formation is greatest.

Copyright: Geology.com

EILEEN GODIN Times Leader Correspondent

Well-water testing in advance of natural gas drilling operations in parts of Luzerne County could give homeowners with wells knowledge, a baseline for future testing and a legal leg to stand on if their water becomes tainted, some experts say.

Marcellus Shale gas drilling is coming into Luzerne County this summer. EnCana Oil and Gas USA Inc., based in Denver, Colo., will be starting a site in Lake Township off Zosh Road in June or July.

Drilling could also be coming to other mostly Back Mountain area communities. Some area groups have voiced strong opposition to the drilling, and some landowners in counties where drilling is already taking place have said their water wells have been inversely affected by gas drilling activities.

EnCana Community Relations Adviser Wendy Wiedenbeck said her company has drilled 8,700 gas wells and has not had “any instance of well water becoming contaminated.” She said EnCana takes great pains not to damage water wells.

“It is in our best interests not to impact water supplies,” she said. Wiedenbeck said that besides using the standard cement casing at the gas-drilling site to protect underground water sources, a second cement casing will be used for added protection.

She said the casings are inspected regularly throughout the life of the well.

Encana’s zero tolerance of spills means its employees are specially trained for operating valves at drilling operations or transporting liquids, she said.

All spills are reportable, and the federal Environmental Protection Agency has a toll-free line to report them at (877) 919-4372.

“We are very proud of our environmental record,” she said.

To be prepared, residents within a mile radius of the drilling sites are advised to have their well water tested, Wiedenbeck said.

The trick is knowing what kind of testing is needed and the proper way to take a sample.

Aqua-Tech Laboratory Director Joseph F. Calabro, Mountain Top, said well water owners should have a state Department of Environmental Protection-certified lab do the testing. Someone who is certified with the lab should draw the water and a chain of custody for the water sample should be followed, he said.

A chain of custody for the sample is a log that is signed and dated by the person taking the water sample and given to the lab, where it is signed and dated upon receipt. Calabro said this log will stand up in court.

A listing of state-certified labs, by county, can be found at http://water.cas.psu.edu. Click on “information” on water issues related to Marcellus drilling. Then, on the right side of the screen, click on “find a lab.”

Calabro said homeowners should know what is normally in their well water. He said small amounts of minerals such as barium, sodium, manganese and iron, are already in well water, along with many other minerals.

He said that once this baseline for what’s in the water is established, then testing for industry-specific indicators can be performed.

He advised that if homeowners notice a change in taste, clarity or smell of their water, they should have it tested right away.

Concerned that nervous residents could be charged for more testing that what is really needed, he said he is willing to attend municipal meetings to discuss minerals and industry-specific indicators to watch for.

Wilkes University geologist Brain Ora said he is hoping homeowners will be willing to share their testing results to compile a database, by zip code, to show water quality history. He said that over time the database will track changes of water quality.

Copyright: Times Leader

As recently as 2002 the United States Geological Survey in its Assessment of Undiscovered Oil and Gas Resources of the Appalachian Basin Province, calculated that the Marcellus Shale contained an estimated undiscovered resource of about 1.9 trillion cubic feet of gas.  That’s a lot of gas but spread over the enormous geographic extent of the Marcellus it was not that much per acre.

In early 2008, Terry Englander, a geoscience professor at Pennsylvania State University, and Gary Lash, a geology professor at the State University of New York at Fredonia, surprised everyone with estimates that the Marcellus might contain more than 500 trillion cubic feet of natural gas. Using some of the same horizontal drilling and hydraulic fracturing methods that had previously been applied in the Barnett Shale of Texas, perhaps 10% of that gas (50 trillion cubic feet) might be recoverable. That volume of natural gas would be enough to supply the entire United States for about two years and have a wellhead value of about one trillion dollars!
Copyright: Geology.com