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In coal is superior to gel water-based hydraulic hydraulic crack crack


Fast. All operations will be split hydraulic gel formation a certain degree of damage. For ordinary reservoir, this side effect caused by the penetration of colonization after fracturing a small increase to compensate for the effective radius. However, in natural cracks strata, natural cracks in the gel solution on the more serious the injury, must be taken to limit the gel solution into the natural fractures of technical measures. Coal is a natural cracks media, from San Juan and Black Warrior Basin to take all the core tests to see when the core has been degraded and filtered with pressure range asserting gel after contact, especially serious injury, usually to reduce the penetration of 13-23. Because the chemical composition of coal can absorb a variety of liquids and gases, resulting in the rock matrix swelling OakGrova oil female pupil tuck soil water pressure and beat Nang Nang Nang at relatively high sand-carrying capacity can fracture if the cost of support, sand concentration, layer bearing the entire ten injured gel well (tons of US-Lou type C, m ') (t) coal strata harm dollars) to have the 500D0 crosslinking 1.245.4 0.731.8 condensate ring pupil has no 28000151992, No. 2 inflation. Even a slight swelling can significantly reduce the fracture surface porosity and permeability, because the porosity of coal is generally only 1-2%, and gel fracturing fluids such as liquid coal is difficult to remove adsorbed. In addition to reduced permeability caused by adsorption, the coal remaining in the gel will form some sort of mechanical blockage fracturing coal seams in period t have asked a variety of natural fractures, some cracks were wide enough to allow the gel polymer through. In order to understand how much gel after fracturing fracturing fluid remain in the ground, for the liquid sample analysis. Fracturing of coal seams from the two samples collected fluid analysis can be expected to adopt a total amount of liquid condensate into the cavity of the condensate liquid 68-8O ah limb, there may 2O a 30% to stay in formation. If a serious injury after fracturing of coal seams, and dried in the formation of the gel solution will be more, at least with vertical cracks in the Black Warrior Basin is the case. The reason, '(1) Most of the fracturing fluid filtration sealed seams, rather than the adjacent boundary layer of shale and limestone (2) thin coal seam, fracturing the total thickness of about 61 meters, and coal is only 6 m (3) coal porosity (endogenous natural cracks and cracks in the larger fish) is very low (1-2%). Gel hydraulic cracking damage of coal following four conclusions can be drawn, 1. Fracturing pressure drop in the early stages of coal seam permeability is high (about 10O mD), Che fracturing fluid loss into the coal seam by the strong stress squeeze, reducing the effective stress, the endogenous cracks open the passage (in the step-down During the counter-productive). 2. Likely to form on the surface of coal seams incomplete cake. 3. Fracturing coal seams hidden deep invasion, the depth of its invasion by the mass balance to estimate Ke. Tie porosity of 1-2% coal exhausted,birkenstock paris, fracturing fluid invasion depth about 15 meters I face the common ground, only a few inches, sealing capacity is very small. On the contrary, the coal production capacity is very great. Amoco Corporation in the Black Warrior Basin have been experimenting with a variety of fracturing design. In order to predict fracturing design support holding the crack length and conductivity, were split horizontal gel hydraulic and hydraulic fracturing to be simulated. Source {16 Taiwan Chinese Petroleum Corporation plans to develop oil fields in Western Siberia Soviet Hu Zhengqin Taiwan's Chinese Petroleum Corporation and the West Siberian oil and gas production associated Yuganskneftegaz Taiwan in Taipei for a week of negotiations. The primary topic is about Xiang Petroleum Corporation developed the possibility of autumn Mingsa Oilfield May this year, Chinese Petroleum Corporation sent a delegation visited the field, and to smell in the study period evaluated field data and information was also reported in the Malaysian Petroleum Corporation intends to spit Lu Bin 45% of total shares of investment cost of $ 1.23 billion to build a refinery, processing capacity of 759 tons / year. Source {(Continued from page 14) between the wellhead pressure and bottom hole pressure to be Taiwan's best relationship. The solution is often away at the same time testing and downhole well testing ground,ed hardy paris, with a few conversion relationship,abercrombie france, find the best relationship. Downhole pressure instability in almost every well test pressure well test can be used instead of the ground. There are a variety of surface well testing, well testing such as pressure recovery, connectivity, monitoring well testing and well testing and other fracturing once people understand and accept the concept of surface well testing, the more it sets for well testing, well understood characteristics. Currently had concurrent _ a mobile data collection caused by high compliance control system,ralph lauren paris, can be used for selection of well control and surface well test data collection system can operate at any time _ though ashamed of people know well the characteristics of the scene without the need to avoid the line can be well controlled on system cost and reliability make it suitable even thrown in a small production wells. End data source l (TheAmerlcanOilandGasReporter) 1991 January.
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