A Development Method Applicable to Low Permeability Reservoirs

Abstract

The invention relates to the technical field of production and development of oil and gas fields, in particular to a development method suitable for low-permeability oil and gas reservoirs. The fracturing process creates multiple artificial fractures with a fracture length greater than or equal to 300m in the reservoir, forming a large-scale artificial fracture area on the entire oil and gas reservoir, and realizing the simultaneous large-scale fracturing development of multiple layers. In this fracturing process, the combination of surfactant fracturing fluid and high-efficiency fluid loss control agent is used to realize single-layer or multi-layer fracturing reconstruction, and multiple artificial fractures and complex fractures with a fracture length greater than or equal to 300m are fractured. In the entire oil and gas reservoir, a large-scale artificial fracture area is formed, which can realize the effect of large-scale fracturing development of multiple layers at the same time.

Description

technical field [0001] The invention relates to a development method of oil and gas reservoirs, in particular to a development method suitable for low permeability oil and gas reservoirs. It belongs to the technical field of oil and gas field production and development. Background technique [0002] The development of low-permeability oil and gas reservoirs occupies an important proportion in the production and development of China's petroleum resources. In order to improve the production and recovery of low-permeability oil and gas fields, various fracturing and other stimulation methods are usually used in the development of low-permeability oil and gas fields. However, the effects of conventional fracturing on increasing production and injection are low, and the effective and stable period is short, which cannot meet the production and development needs of low-permeability oil and gas fields. At present, the horizontal well fracturing technology developed at home and abro...

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Problems solved by technology

[0002] The development of low-permeability oil and gas reservoirs occupies an important proportion in the production and development of China's petroleum resources. In order to improve the production and recovery of low-permeability oil and gas fields, various fracturing and other stimulation methods are usually used in the development of low-permeability oil and gas fields. However, the effects of conventional fracturing on increasing production and injection are low, and the effective and stable period is short, which cannot meet the production and development needs of low-permeability oil and gas fields. At present, the horizontal well fracturing technology developed at home and abroad can better improve oil and gas fields. However, this technology also has certain problems. The drilling and completion cost of horizontal wells is much higher than that of vertical wells or directional wells. In most cases, horizontal well completion methods do not consider the later transformation and management, which is not conducive to the later stage. Fracturing re-engineering and water control management. In addition, horizontal well fracturing mostly adopts staged fracturing, which requires high equipment such as pipe strings and packers, resulting in increased development costs, and the horizontal well fracturing operation cycle is long , not only has high requirements on the performance of fracturing fluid, but also it is difficult to flow back the fracturing fluid, which is likely to cause great damage to the reservoir, and the flowback fluid usually causes great environmental pollution and waste of resources because it cannot be reused, and Horizontal well stimulation measures are usually single-layer stimulation, and multi-layer stimulation cannot be carried out at the same time

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