Process method for communication of isolated sweet points among carbonate fracture cave oil reservoir wells
A technological method and carbonate technology, applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., can solve the problems of complex construction, inability to achieve sweet spot development, long construction period, etc., and achieve enhanced oil recovery Effect
Active Publication Date: 2020-07-31
BEIJING GEPETTO OIL TECH
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[0003] The purpose of the present invention is to aim at the sidetracking method commonly used in sweet spot communication in carbonate fractured-cavity reservoirs at present, which can only focus on the development of larger sweet spot areas, and cannot achieve the development of multiple smaller sweet spot areas, and the construction For the problems of long period and relatively complex construction, a new process method for communication of isolated sweet spots between wells in carbonate fracture-cavity reservoirs is provided
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[0026] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0027] Such as Figure 1-3 As shown, the isolated sweet spot communication process method between wells in carbonate fracture-cavity reservoirs of the present invention comprises the following specific steps:
[0028] Step S1, according to the high-resolution 3D seismic data, locate the previously undeveloped sweet spot area with fracturing communication potential within 200m from the wellbore, and determine the specific orientation and distance between the wellbore and the sweet spot.
[0029] In this step, try to ensure the reliability of seismic reservoir prediction. The seismic grid used should be as fine as possible. At the same time, for the predicted sweet sp...
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The invention discloses a process method for communication of isolated sweet points among carbonate fracture cave oil reservoir wells. The process method mainly comprises the steps of firstly, positioning a sweet point area with fracturing communication potential according to regional high-resolution three-dimensional seismic data, and determining the positions and distances among shafts and the sweet points; selecting a fracturing optimal well; then carrying out fracturing feasibility numerical simulation, determining an optimal fracturing horizon and optimizing a fracturing design scheme; carrying out conventional fracturing, carrying out close tracking in the fracturing process, and if the first fracturing communication is not successful, adding a temporary blocking agent in fractures to turn according to different conditions, specifically, the sweet point direction has a cracking advantage during fracturing; and if the characteristics of the construction curve have communication sweet point signs in the fracturing process, carrying out acid fracturing. According to the process method, the problem of too high cost of measures such as sidetracking can be avoided, meanwhile, the problem of the communication of the isolated sweet points among the carbonate fracture cave oil reservoir wells can be effectively solved, the refined development of the sweet points can be realized, and the oil and gas recovery efficiency of oil reservoirs can be improved.
Description
technical field [0001] The invention relates to the technical field of increasing production of oil and natural gas, in particular to a new process for communicating isolated sweet spots between wells in carbonate fracture-vug reservoirs. Background technique [0002] With the development of high-resolution 3D seismic technology in recent years, it is possible to accurately locate geological sweet spots, especially in fractured-cavity carbonate reservoirs, where there are many sweet spots, but conventional methods are difficult to develop within a certain range from the wellbore. dessert. Communicating sweet spots through fracking becomes a viable means of solving this problem. At present, the conventional method of sweet spot communication in oil and gas wells is sidetracking. This sidetracking method has great limitations. complex. (2) It has great limitations. Sidetracking often focuses on the development of a large sweet spot area, and cannot develop multiple smaller ...
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IPC IPC(8): E21B43/267E21B43/27
CPCE21B43/267E21B43/26
Inventor 曾斌刘彦斌陈杉沁刘想平廖进
Owner BEIJING GEPETTO OIL TECH