An infill method and evaluation method for horizontal well development of gas reservoir pattern
An infill method and evaluation method technology, applied in the field of horizontal well development gas reservoir pattern intensification method and its evaluation, to achieve the effects of reducing plane contradictions, improving well pattern utilization, and increasing cumulative oil production
Active Publication Date: 2021-08-31
PETROCHINA CO LTD
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Problems solved by technology
At present, no scholars at home and abroad have publicly published relevant research on the optimization design of well pattern infill in horizontal well development gas reservoirs
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[0031] The present invention will be further described through the evaluation of well pattern intensification and well pattern intensification scheme for horizontal well development in a gas field below.
[0032] Step 1: Design three sets of well pattern encryption schemes;
[0033] For the rectangular horizontal well development unit composed of the first horizontal well 1, the second horizontal well 2, the third horizontal well 3 and the fourth horizontal well 4, the infill well types are all vertical wells, and the numbers of the three sets of infill wells are 1, 2, 3. The deployment positions of infill wells are as follows:
[0034] Scheme 1: When there is only one infill well, the first infill well 5 is deployed in the first horizontal well 1, the second horizontal well 2, the third horizontal well 3 and the fourth horizontal well 4 near the end points to form a quadrilateral diagonal At the intersection; that is: the first infill well 5 is deployed at the center of the ...
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The invention discloses a horizontal well development gas reservoir well pattern encryption method and an evaluation method thereof, and relates to the technical field of natural gas reservoir engineering. Horizontal well development gas reservoir well pattern intensification method, by arranging a reasonable number of infill wells at appropriate positions in the minimum horizontal well pattern development unit, realizes the orderly development of each set of vertical strata, improves the utilization rate of the well pattern, and at the same time Reservoirs can be produced uniformly, reducing plane conflicts in the process of reservoir development, which is conducive to increasing the cumulative oil production of the oilfield and improving the recovery factor. The above-mentioned evaluation method of well pattern intensification method for horizontal well development in gas reservoirs, combined with various factors such as cost, gas price, and tax, can more objectively evaluate the development potential of oil reservoirs and guide oilfield development and production practices.
Description
technical field [0001] The invention relates to the technical field of natural gas reservoir engineering, in particular to a well pattern encryption method for horizontal well development and an evaluation method thereof. Background technique [0002] In recent years, horizontal wells have been more and more widely used in tight gas reservoirs. Although, the use of horizontal wells can greatly increase the contact area between the wellbore and the gas reservoir, reduce gas seepage resistance, and increase the degree of reserve production when the horizontal well encounters gas layers. . However, horizontal wells have a relatively low production degree in the vertical direction of the reservoir, and some unperforated reservoirs still have great development potential, such as figure 1 As shown, the gas in the perforated layer of the horizontal well can easily flow to the wellbore, and then be exploited to the ground; but the fluid in the two gas layers separated by the interl...
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IPC IPC(8): E21B43/30G06F30/20G06Q10/06
CPCE21B43/305G06Q10/0639G06F30/20
Inventor 刘鹏程安红燕段志强李浮萍郑腊年
Owner PETROCHINA CO LTD