A method for adding sand to oil and gas reservoir fracturing

A kind of fracturing and fracturing fluid technology, which is applied in the direction of earthwork drilling, wellbore/well components, production fluid, etc., which can solve the problem of low utilization rate of fracturing and fracture creation space, failure of effective use of fracture creation space, support and influence Issues such as post-fracturing flow conductivity and other issues can be achieved to improve the effect of fracturing stimulation, improve long-term flow conductivity, and improve development benefits

Active Publication Date: 2022-03-15
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The higher the filling degree of the fracture, the higher the utilization rate of the fracturing space; on the contrary, the lower the utilization rate of the fracturing space, most of the fracturing space cannot be effectively used and supported, which affects the post-fracture conductivity

Method used

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  • A method for adding sand to oil and gas reservoir fracturing
  • A method for adding sand to oil and gas reservoir fracturing
  • A method for adding sand to oil and gas reservoir fracturing

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Embodiment Construction

[0112] The present invention will be further described through specific examples below. However, it should be understood that the following examples are only used to further illustrate the present invention, but do not limit the present invention.

[0113] Well X is a typical evaluation well for tight gas reservoirs, the fractured interval of the target layer is 3250.7-3261.5m, 10.8m / 1 layer; the wellbore volume is 15m 3 The lithology of the target layer is gray pebble-bearing fine sandstone, with an average porosity of 9.73%, a permeability of 0.259mD, a pressure coefficient of 1.0, and a temperature of 120°C. It is a gas reservoir with low porosity, ultra-low permeability, normal temperature and normal pressure.

[0114] In order to evaluate the gas-bearing property and production capacity of the sand formation in the target layer, the fracturing scheme design and field pilot test of the well were carried out by referring to the process method proposed by the present inventi...

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Abstract

The invention relates to a method for adding sand to fracturing of oil and gas reservoirs. In the method, different types of fracturing fluids are used in the fracture-making stage of the pre-fluid and the sanding stage of different sand-carrying fluids, and proppants with different densities and particle sizes are used together. , optimize the configuration of the proppant in the entire fracture space, improve the conductivity of the fracture, and thus improve the fracturing effect. The present invention further synergistically optimizes construction parameters such as fracturing fluid displacement, liquid volume, and sand-to-liquid ratio in different fracturing construction stages, so that the proppant is evenly laid in the entire fracture space, and the "filling degree" of the proppant in the fracture is improved. " and "Supporting Efficiency", improve the effective diversion capacity after pressing, and solve the problems of low initial production after pressing, rapid production decline, and short production stabilization period.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir hydraulic fracturing stimulation and reformation, in particular to a sand adding method for oil and gas reservoir fracturing. Background technique [0002] The core of hydraulic fracturing technology includes two parts, one is fracturing and fracture creation, and the other is proppant filling and forming propped fractures with a certain conductivity. The longer the supporting fracture length and the higher the effective conductivity of the fracture, the higher the production after fracturing and the slower the production decline rate. [0003] The characteristics of the reservoir itself, the optimal selection of fracturing fluid and proppant, and the optimization of fracturing operation parameters can all affect the effect of sand addition in fracturing. [0004] For example, if the in-situ stress of the reservoir is high, the Young's modulus is large, and the fluid loss is large, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/267
Inventor 刘建坤蒋廷学侯磊周林波吴春方吴峙颖左罗
Owner CHINA PETROLEUM & CHEM CORP
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