Method and device for well network reconstruction for developing thin and poor oil reservoir
A thin poor oil layer and well pattern technology, which is applied in the field of well pattern reconstruction in the development of thin poor oil layers, can solve the problems of large oil-water well ratio in water drive well pattern, small average single well oil increase, and low degree of sand body control. To achieve the effect of improving the development effect and reducing the injection-production well spacing
Active Publication Date: 2020-06-23
DAQING OILFIELD CO LTD +1
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Problems solved by technology
[0004] In view of this, the present invention provides a method and device for developing well pattern reconstruction in thin and poor oil layers, so as to solve the problem of large oil-water well ratio, low degree of sand body control, and reduced injection-production well spacing in thin and poor oil layers. The connection direction of the well group, the average single well oil increase rate is small, and the water cut is large
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[0042] The present invention will be described below based on examples, but it should be noted that the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. However, the present invention can be fully understood by those skilled in the art about the parts that are not described in detail.
[0043] In addition, those of ordinary skill in the art should understand that the provided drawings are only for illustrating the objects, features and advantages of the present invention, and the drawings are not actually drawn to scale.
[0044] At the same time, unless the context clearly requires, the words "include", "include" and other similar words in the entire specification and claims should be interpreted as an inclusive meaning rather than an exclusive or exhaustive meaning; that is, "include but not limited to the meaning of ".
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Abstract
The invention discloses a method and device for well network reconstruction for developing a thin and poor oil reservoir, and relates to the technical field of oil and gas reservoir development. The method for well network reconstruction for developing a thin and poor oil reservoir comprises the steps that well network reconstruction schemes are set for the thin and poor oil reservoir, wherein thewell network reconstruction schemes at least include two following schemes: the first scheme is to replace a water flooding water well row with a polymer flooding injection well and replace a water flooding oil well row with a polymer flooding recovery well, the second scheme is to replace the water flooding water well row with a polymer flooding injection well, and the third scheme is to replacethe water flooding water well row with a polymer flooding recovery well; a total recovery degree of each scheme is determined, and the total benefit of each scheme is determined according to the total recovery degree of each scheme and a total investment cost of each scheme; and a well network reconstruction scheme is determined according to the total benefit of each scheme. The method and deviceare used to solve the problems that a water flooding well network of the thin and poor oil reservoir is large in oil-water well number ratio and low in sand control degree, the number of well group communication directions is reduced by the injector-producer distance, the average oil increasing per well is small and water content is high.
Description
technical field [0001] The present invention relates to the technical field of oil and gas reservoir development, in particular to a method and device for developing well pattern reconstruction of thin poor oil layers, especially the comprehensive utilization of water and polymer flooding well patterns to carry out thin poor oil layers, that is, thickness ≤ 0.5m Method and device for oil reservoir exploitation. Background technique [0002] Aiming at the problem of poor development effect of thin and poor oil layers, in 2013, the limit fracturing test of oil and water wells was carried out in the low-yield and low-efficiency wells of Xingnan Development Zone (Study on seepage characteristics and injection-production well condition parameters of precision-controlled fracturing reservoirs in Xingjiu area. [D] Northeast Petroleum University, 2016), that is, through simultaneous fracturing of the corresponding sand bodies of oil and water wells, the seepage capacity can be impro...
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Login to View More IPC IPC(8): E21B43/30E21B43/20E21B49/00
CPCE21B43/30E21B43/20E21B49/00
Inventor 陈梅苗厚纯徐炳涛白玉果孟婧姜丽丽
Owner DAQING OILFIELD CO LTD