A Zoning Method for Combined Steam Huff and Puff in Heavy Oil Reservoirs
A technology combining steam and heavy oil reservoirs, applied in the research field of thermal recovery and development of heavy oil reservoirs, can solve problems such as unbalanced production and lack of zoning methods
Active Publication Date: 2021-07-06
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0003] The purpose of the present invention is to provide a zoning method for combined steam huff and puff of heavy oil reservoirs, solve the problem of lack of zoning methods when implementing combined steam huff and puff technology in mines, and realize scientific division and combination in the development of steam huff and puff of heavy oil reservoir combinations Huff and puff area, so as to effectively control the problem of steam channeling between steam huff and puff wells and unbalanced production
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[0037] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.
[0038] Through the research on the mechanism of combination throughput effect, combination timing optimization and mine practice, it is realized that it is better to switch to combination throughput sooner rather than later. The effect of combination before steam channeling is better than that after steam channeling. Prediction of steam channeling between wells. The present invention studies the dynamic and static factors affecting the steam channeling between wells, determines the main control factors affecting the steam channeling time, establishes a prediction model of the steam channeling time under multiple main control factors, and realizes the prediction of the steam channeling in the research block. sentenced.
[0039] Such as figure 1 ...
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The invention provides a zoning method for combined steam huff and puff in heavy oil reservoir, including: establishing a numerical simulation model of steam channeling between wells of heavy oil reservoir steam huff and puff; The relationship between the steam channeling time between wells; analyze the significance of the influence of each parameter on the steam channeling time between wells of steam huff and puff, and determine the main control factors affecting the steam channeling time; use the functional relationship between the steam channeling time and each single main control factor to establish Prediction model of steam channeling time between huff and puff wells under multiple main control factors; use the data of steam channeled wells in the study block to regress to determine the coefficients in the prediction model; The steam channeling level is divided according to the time when steam channeling occurs, and the correlation status of steam channeling between wells in the study block is obtained. The invention can provide solid theoretical guidance for the implementation of combined steam huff and puff in mines.
Description
technical field [0001] The invention relates to the research field of thermal recovery development of heavy oil reservoirs, in particular to a divisional method for combined steam huff and puff of heavy oil reservoirs. Background technique [0002] Combined steam huff and puff technology in heavy oil reservoirs is to inject steam into multiple steam huff and puff wells in a combined huff and puff area at the same time, and start production at the same time; this technology can effectively control steam channeling between huff and puff wells, improve uneven production, and has low operating costs , Strong practicability, domestic and foreign mining practice has achieved good development benefits. However, in the past, when mines implemented combined steam huff and puff technology, they always divided combined huff and puff areas artificially, and the operation was highly subjective. There was no clear, reliable and scientific method for which huff and puff wells should be div...
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Login to View More IPC IPC(8): E21B43/24G06F30/20G06F111/10G06F119/14
CPCE21B43/24G06F30/20
Inventor 杨艳霞孙业恒吴光焕邓宏伟韦涛李伟王可君于建梅刘祖鹏闵令元李伟忠王一平王传飞石军平陈桂华
Owner CHINA PETROLEUM & CHEM CORP