A Classified Test and Allocation Design Method for Split Injection Wells
A design method and classification testing technology, applied in measurement, earthwork drilling and production, wellbore/well components, etc., can solve problems such as heavy testing workload, restricted water flooding development effect of reservoirs, and decreased pass rate of stratified injection , to achieve the effects of improving the qualified rate, increasing the number of fast well test wells with stratified flow rate changes, and improving the development effect
Active Publication Date: 2020-09-04
PETROCHINA CO LTD
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Problems solved by technology
[0003] The purpose of the present invention is to solve the problem of large testing workload in the testing process of separate injection wells at present, some wells cannot meet the requirements of testing well times, resulting in a rapid decline in the qualification rate of layered injection, increasing the cost of on-site testing equipment and personnel, and restricting oil reservoirs The problem of water flooding development effect
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings:
[0026] See figure 2 , The classification test deployment design method of the split injection well of the present invention includes the following steps:
[0027] Step 1: Screen normal water injection wells. Part of the wells that are not normally injected under special operations or other reasons will be screened out, and this part of the wells will not be classified, and the sequence of testing and deployment will be clarified according to the production needs;
[0028] Due to on-site production and other reasons, some sub-injection wells cannot normally inject water, or related tests are performed according to geological requirements. The present invention mainly studies normal water injection wells.
[0029] Step 2: Collect whether the water injection volume of all wells of normal water injection wells meets the injection allocation requirements, and screen out...
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The invention discloses a design method for classified testing and allocation of separate injection wells. The design method comprises the steps that a separate injection well to be tested is classified and calculated according to the field dynamic test data, wellhead pressure fluctuation, pressure variation of a water injection system, test data of a water injection profile and the like, the testing sequence of layered flow of the separate injection well to be tested is defined, testing of the number of wells of the separate injection well is rationally optimized under different water injection conditions, the integration of geology and technology is achieved, and workload of testing and allocation of the separate injection well is rationally optimized. According to the design method forthe classified testing and allocation of the separate injection wells, in combination with existing test data of the separate injection well and present situation of water injection, the testing and allocation sequence of the separate injection well is defined, testing of number of the wells of a single well is optimized, and the field test and allocation workload is effectively controlled; testing of the number of wells with high variable speed of the layered flow is increased, and the qualified rate of layered water injection is improved; the cost is reduced and the efficiency is increased in field operation, the development effect of water drive of oil reservoirs is promoted, and a solid foundation for reducing production cost and increasing efficiency in oilfield production is laid.
Description
Technical field [0001] The invention belongs to the technical field of oilfield water injection and on-site management, and relates to a classification test deployment design method for separate injection wells. Background technique [0002] Fine stratified water injection technology is the most economical and effective technology for enhancing oil recovery in low-permeability oilfields. In recent years, the technology has been continuously optimized and perfected to meet the needs of different water injection development technologies. The measurement and adjustment technology has been continuously improved, and the measurement and adjustment efficiency and success rate have been greatly improved. , Boosting the progress of oilfield water injection development level. At present, except for some special demand test wells, the test and deployment of sub-injection wells are all manually tested in a fixed cycle. With the continuous increase in the number of sub-injection wells, the w...
Claims
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IPC IPC(8): E21B43/20E21B47/00
CPCE21B43/20E21B47/00
Inventor 杨玲智姚斌巨亚锋于九政毕福伟王子建刘延青邱筱琳
Owner PETROCHINA CO LTD