Horizontal well spacing optimization method based on coring analysis after horizontal well fracturing

Abstract

The invention provides a horizontal well spacing optimization method based on coring analysis after horizontal well fracturing. The horizontal well spacing optimization method comprises the steps that stress parameter data of a target work area is obtained, the stress parameter data comprises the minimum horizontal principal stress direction; the horizontal well spacing distance of two horizontal wells is obtained according to the estimated fracturing fracture parameters and the minimum horizontal principal stress direction during target block reservoir transformation, and the two drilled target horizontal wells are fractured according to the horizontal well spacing distance and through a preset fracturing scheme; according to the positions of the two target horizontal wells, the minimum horizontal principal stress direction and a preset fracturing scheme, a well track and coring parameters of a coring well are obtained, drilling coring is carried out according to the well track and the coring parameters, and then fracture parameters of a taken rock core are measured to obtain the spatial distribution situation of hydraulic fractures in the target work area; and according to the hydraulic fracture space distribution condition of the target work area, the horizontal well spacing distance of subsequent well drilling of the target work area is optimized, and the work area well spacing reasonability is improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas well production reconstruction, in particular to a method and device for optimizing the spacing of horizontal wells based on coring analysis after horizontal well fracturing. Background technique [0002] At present, hydraulic fracturing technology has become an indispensable means of increasing production in "three-low" oil and gas reservoirs. Accurately obtaining the spatial distribution of hydraulic fractures in hydraulic fracturing, and optimizing the spacing of horizontal wells in the work area according to the spatial distribution of hydraulic fractures will greatly improve the The production capacity of the work area is very important. [0003] Fracture monitoring technology is an important means to obtain the law of hydraulic fracture propagation. At present, there are three methods for on-site monitoring of hydraulic fractures: 1. Indirect monitoring methods: mainly including net pres...

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Problems solved by technology

[0003] Fracture monitoring technology is an important means to obtain the law of hydraulic fracture propagation. At present, there are three methods for on-site monitoring of hydraulic fractures: 1. Indirect monitoring methods: mainly including net pressure analysis, well testing and production analysis. The main disadvantage of this method is the analysis results It is often non-uniform and needs to be corrected with the results of direct fracture monitoring; 2. Direct monitoring near the wellbore: including radioactive tracers, temperature logging, production logging, and caliper measurement. The main disadvantage of this method is that it can only obtain Fracture parameters within 1m near the wellbore; 3. Direct far-field monitoring: including ground inclinometer, downhole inclinometer and micro-seismic technology. expand

However, with the continuous improvement of people's understanding level, the above three technologies are less effective in accurately describing the length and width of fractures, which directly affects the rationality of well layout and further affects the productivity of the work area.

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