Quantitative forecast method for double-wing seam lengths of fracturing crack
A fracturing and double-wing technology, which is applied in the field of oil and gas development and petroleum engineering, and can solve the problem that the length of the double-wing slit in fracturing fractures cannot be accurately predicted.
Pending Publication Date: 2018-08-24
刘敬寿
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Problems solved by technology
[0003] The present invention aims to solve the above problems, and provides a quantitative prediction method for the double-wing slit length of fracturing fractures, which solves the problem that the double-wing slit length of fracturing fractures cannot be accurately predicted
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[0035] The specific technical scheme of the present invention is illustrated by taking the quantitative prediction of the double-wing slit length of the fracturing fracture in the W block of the Huaqing Oilfield in the southwest of the Ordos Basin as an example:
[0036] Huaqing Oilfield is located in Huachi County, Gansu Province, with an area of about 300 square kilometers. It belongs to the loess plateau landform. The surface is covered by Quaternary loess with a thickness of 100-200m. In the deep valley cut by the river, exposed rocks can be seen. The ground elevation is 1350-1660m, and the relative height difference is about 310m. Belongs to the southern part of the northern Shaanxi slope in the Ordos Basin, a local uplift formed by differential compaction, generally a gentle west-dipping monocline, with east-west low-amplitude row-like nose-shaped uplifts developed on the monocline background; it belongs to lithologic oil reservoirs, deltas In frontal lake bottom slum...
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The invention relates to the field of oil and gas exploitation and petroleum engineering, especially relating to a quantitative forecast method for double-wing seam lengths of a fracturing crack. Themethod comprises the following steps: converting parameter interpretations for logging rock mechanics and parameters for dynamic and static mechanics of rocks and building a three-dimensional mechanical parameter field of a work area in order to carry out heterogeneous geomechanical modeling and simulate a stress field in a well area in a refined manner; picking up a refined simulation result of the stress field in the well area by utilizing microseismic monitoring fracture points and building the quantitative forecast method for double-wing seam lengths of the fracturing crack by performing microseismic monitoring operation on differentiation evaluation indices of double-wing seam lengths of the fracturing crack. The quantitative forecast method is capable of performing quantitative forecast on the double-wing seam lengths of the fracturing crack by strict deduction of mathematical algorithm, adoption of fully-fledged numerical simulation of the stress field and programming of corresponding computer programs. With the method, the problem that double-wing seam lengths of the fracturing crack cannot be accurately forecasted is resolved.
Description
technical field [0001] The invention relates to the fields of oil and gas development and petroleum engineering, in particular to a method for quantitatively predicting the length of double-wing slits in fracturing fractures. Background technique [0002] In the fields of oil and gas development and petroleum engineering, with the exploration and development of tight oil and gas and shale gas, horizontal wells have become an important means of increasing production. In order to achieve high-quality, fast and low-cost drilling and completion operations, and to maximize the productivity of horizontal wells, the systematic study of the double-wing fracture length of fracturing fractures is very important for reservoir characteristics, horizontal well drilling, stimulation, and oil and gas development. At present, the length of the double-wing fractures of fracturing fractures is mainly based on the simulation of half-length fractures, and it is believed that the lengths of the ...
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Login to View More IPC IPC(8): E21B47/00G06F17/50
CPCE21B47/00G06F30/23
Inventor 刘敬寿
Owner 刘敬寿