Method for improving recovery ratio of braided well pattern of hugely thick or multi-layer oil and gas reservoir
A technology for oil and gas reservoirs and recovery, which is applied in the direction of production fluid, earthwork drilling and production, wellbore/well components, etc., and can solve problems such as the design and retention of well patterns that have not undergone large-displacement space development to enhance recovery
Active Publication Date: 2020-08-28
SOUTHWEST PETROLEUM UNIV +1
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Problems solved by technology
However, for extremely thick or multi-layered oil and gas reservoirs, there is currently no efficient development well pattern design, nor has there been any design of large-displacement space development well pattern for enhanced recovery.
The research on the design of spatial well pattern EOR for extremely thick or multi-layered oil and gas reservoirs is still in the exploration aspect, and no scholars have conducted research on the design of spatial well pattern EOR for extended-reach wells
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[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. Unless otherwise defined, the technical terms or scientific terms used in the disclosure of the present invention shall have the usual meanings understood by those skilled in the art to which the disclosure belongs. Words such as "comprising" or "comprising" used in the disclosure of the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects .
[0029] Taking the extremely thick carbonate oil reservoir in Brazil as an example, the boundary of the oil and gas reservoir is obtained through seismic volume data, and the main development layer s...
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The invention discloses a method for improving the recovery ratio of a braided well pattern of a hugely thick or multi-layer oil and gas reservoir. The recovery ratio of the hugely thick or multi-layer oil and gas reservoir is improved by designing the braided well pattern. The braided well pattern is designed through the following method: dividing a cubic development unit of the oil and gas reservoir; measuring physical property parameters of the cubic development unit; calculating well pattern design parameters according to the physical property parameters, wherein the well pattern design parameters comprise well number and well body track; and drilling a large-displacement horizontal well according to the well pattern design parameters. The step of dividing the cubic development unit ofthe oil and gas reservoir specifically comprises: obtaining the boundary of the oil and gas reservoir through seismic volume data; obtaining a main development layer system of the oil and gas reservoir according to a geological model established according to exploratory well parameters; and establishing a cube with the largest volume in the main development layer system, wherein the cube is the cubic development unit. According to the method, the recovery ratio of the hugely thick or multi-layer oil and gas reservoir can be effectively improved.
Description
technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a method for increasing oil recovery by weaving well patterns in extremely thick or multi-layered oil and gas reservoirs. Background technique [0002] Due to the huge geological reserves, the effective development of extremely thick or multi-layer oil and gas reservoirs can improve my country's energy structure and supplement the shortage of conventional oil and gas reservoirs in my country's geographical distribution and supply. Due to the high Young's modulus of extremely thick or multi-layer oil and gas reservoirs, the fracturing effect of the reservoir is poor, and the fracturing measures have a poor producing effect on the reservoir. At the same time, the thickness of extremely thick or multi-layer oil and gas reservoirs is relatively large, and it is difficult for vertical wells and conventional horizontal wells to efficiently produce reservo...
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IPC IPC(8): E21B49/00E21B43/30G06F30/20
CPCE21B49/00E21B43/30E21B43/305G06F30/20E21B43/00E21B2200/20E21B49/003G01V20/00
Inventor 彭小龙孟选刚王超文邓鹏冯宁吴昊镪高飞龙
Owner SOUTHWEST PETROLEUM UNIV