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《Journal of Chengdu University of Technology(Science & Technology Edition)》 2003-04
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THE EFFECT ANALYSIS OF CONING WATER AT THE LOW-WATER-CUT PERIOD IN TAHE OILFIELD OF XINJIANG

YANG Lei 1, LI Zong yu 2 (1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, China; 2.Academy of Designing and Planning, Northwest Part Company, SINOPEC, China)  
The coning of bottom water will happen as soon as the producing pressure drop of a well is higher than the difference of gravity caused by the difference of density between oil and water. So many effective measures to control the producing pressure drop in Block 1 of the Tahe oilfield have been taken to make the reservoir drop the cumulative water oil ratio and lower the decline rate of oil production. These measures include that vertical wells were reduced chokes to drop producing pressure drop by 2.5 MPa or so, that little diameter chokes were used in the wells put into production, that the well during high water cut period was closed, that the horizontal wells were put into production one by one, and that the wells of TK106H and TK108H were produced by controlling the production lower than their critical rates. Therefore , the result of controlling bottom water measures is that the recovery at end of the low water cut period reached 4.85 percent in Block 1 of the Tahe oilfield. It is more higher than that of 0.55 percent in Block 2 of the Tahe oilfield. So the reservoir is closed to reach the aim of coning water and the ultimate recovery factor is improved.
【CateGory Index】: TE323
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