Method for modifying and optimizing fractured oil and gas reservoir infilled well

Abstract

The invention relates to a method for modifying and optimizing fractured an oil and gas reservoir infilled well in a fractured oil and gas reservoir production process. The method comprises the following steps: S1, establishing a three-dimensional geological grid attribute model; S2, establishing a natural fracture grid attribute model; S3, establishing a hydraulic fracturing simulation model; S4,establishing a three-dimensional oil and gas reservoir numerical simulation model, and calculating a reservoir pore pressure field and a temperature field in production and injection processes; S5, establishing a three-dimensional crustal stress model suitable for mechanical calculation; S6, generating an initial three-dimensional crustal stress field; S7, establishing a four-dimensional dynamiccrustal stress model; S8, solving the seepage-stress coupling model; and S9, optimizing reservoir transformation process parametersd. The method has the beneficial effects that the change of crustal stress and pore elastic parameters in the fracturing well reservoir development process can be effectively reflected according to the characteristics of fractured oil and gas reservoirs, and guidance is provided for arrangement of the infilled well and optimization of a fracturing transformation scheme.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas development, in particular to an optimization method for reforming infill wells in fractured oil and gas reservoirs. Background technique [0002] At present, oil and gas resources still play an important role in my country's energy security and national economic development. Among them, the proportion of unconventional resources in my country's oil and gas production field is gradually increasing, especially shale oil and gas resources. Such reservoirs often have particularly developed natural fractures. How to develop this kind of oil and gas reservoir resources reasonably and efficiently has become a concern in the field of oil and gas exploration and development. my country's shale oil and gas resources development theory and method are still in the exploratory stage. During the development process, it is necessary to evaluate the early development effect, adjust the follow-up developme...

AI Technical Summary

Problems solved by technology

However, the existing simulation methods mostly use the ideal assumption model, without considering the fracture reservoir seepage model, while the hydraulic fracturing fracture uses a simple two-wing slot model, which is not based on the actual production of oil and gas reservoirs.

In addition, there is still a lack of systematic guidance methods for oil and gas reservoir infill well selection and construction parameter optimization under the condition of dynamic in-situ stress field in the actual production process of oil and gas reservoirs.

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