China Sinology and American unconventional natural gas

The rapid development of USA unconventional natural gas , mainly depends on its natural gas demand driven, benefiting from policies to support, the progress of technology security, geographical condition is superior, the oil and gas companies affected by factors such as management enthusiasm of  interests driven ,which is the best day, geography, and support of the people.

Abundant unconventional natural gas resources of American

Statistics show that, America total gas remaining technologically recoverable resources to reach 52 * 1012m3. Among them, the technology of unconventional gas resources recoverable resources to reach 45 * 1012m3, which is about 6 times the surplus conventional natural gas  recoverable resources.

  In addition, America most unconventional oil and gas area is located in the plain area, with convenient traffic, flat terrain, abundant water, unconventional natural gas for the implementation of large-scale development is very favorable.

Technique solved the problem of the development of unconventional gas

Technological progress solved a series of problems facing the development of
unconventional natural gas, especially the horizontal well staged fracturing and its series plus supporting technology make originally difficult to develop and use of unconventional natural gas reserves can be used, the unit cost is greatly reduced, the formation of scale benefit, oil and gas company profits increased.

The filter body filter loss is difficult to estimate

Natural fractures natural reservoir medium cracks and under the action of external force can open the potential presence of cracks, which makes the liquid in the fracturing fluid loss coefficient showed 2 characteristics,

  One is the filtration coefficient is dynamic, the other one is the filtration coefficient than the homogeneous medium under the same conditions much more,
Is usually increased the magnitude of the.

It is this kind of reservoir fracturing sand plug an important reason for the high rate.

What are the factors of fracturing sand plug?

1, sand is not smooth.
2, return is not closed in place.
3, the sand cloth, plastic bags and other debris blocking.
4, the fracturing fluid in the wellbore degeneration or irrational allocation.
5, perforation or stratum causes cannot continue into the sand.
6, downhole tool damage leading to shunt.
7, other abnormal situations.

The first reason of rapid development of American unconventional natural gas

Good external conditions.

 USA gas demand for huge amount, at the end of twentieth Century through the promulgation of Energy Law and other laws windfall tax, subsidies, used to reduce the risk of oil and gas enterprises development of unconventional natural gas , to encourage the development of unconventional natural gas, oil and gas companies promote positive development of unconventional natural gas boom.

The great development of USA unconventional natural gas shocked the world

American gas production peak in the platform to run long. According to 5000 * 108m3 as natural gas production peak platform computing, beginning in 1968, the U.S. natural gas entered the stable development period, 40 years of continuous operation in the peak platform, prosperous.

  In 2010, natural gas annual output reached 6110 * 108m3, the proportion of natural gas in the United States, the primary energy consumption accounted for 27%. Among them, 1754 * 108m3 dense gas, Shale gas , Coal seam gas of 1378 * 108m3 484 * 108m3. Unconventional natural gas volume reached 3616 * 108m3, American accounted for nearly 60% of total annual output of the natural gas.

  American gas operation for over 40 years at the peak of the platform, and become a pioneer in the world of successful use of natural gas, mainly due to the unconventional natural gas development.

In twentieth Century 80 time metaphase, America natural gas production decline phenomenon, the rapid rise of unconventional natural gas , quickly make up the conventional natural gas production decline in the gap, and sustainable development, make two years to become the world's largest American gas recently, make America gas inlet quantity is greatly reduced, and the overall low the price of natural gas in the international trade.

Strategic position of unconventional gas

Unconventional gas mainly consists of tight sandstone gas (hereinafter referred to as thedense gas), coalbed methane and shale gas.

  In recent years, unconventional gas tight gas, coalbed methane and shale gas as the representative of the rapid development attracted the attention of the world,especially the rapid development of American unconventional  gas to natural gas industry has undergone changes in turn the world upside down.

  As a developing country, China is in a critical period of economic and social development, a large number of high-quality, need clean energy. From the energy efficiency and CO2 emissioncharacteristics, natural gas is a current period ideal clean energy. Unconventional gas as the younger members of the family of natural gas, occupy a strategic position play a decisive role in the development of Chinese in natural gas.

  Therefore, the full analysis of the development USA unconventional , exerting the advantage of backwardness, positioning, development of good, make good use of Chinese of unconventional gas resources in China natural gas  industry development and social economic operation is of great strategic significance.