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Design method of low-permeability reservoir or gas reservoir well completion engineering

A design method, low-permeability technology, used in calculations, earthmoving, wellbore/well components, etc.

Active Publication Date: 2019-08-20
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The completion method is related to many factors such as the structural and geological characteristics of the oil and gas reservoir, the physical properties of the reservoir rock and fluid, the drilling and production process, the need for production stimulation, and the stability of the borehole wall.
In addition, one-sided or similar experience plays a dominant role in the selection of well completion methods in existing technologies

Method used

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  • Design method of low-permeability reservoir or gas reservoir well completion engineering
  • Design method of low-permeability reservoir or gas reservoir well completion engineering
  • Design method of low-permeability reservoir or gas reservoir well completion engineering

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] The design method of the completion engineering of the low permeability reservoir provided in this embodiment, the design method refers to figure 1 The flow chart shown includes the following steps in sequence:

[0077] (1) Using the ultrasonic transmission method to obtain the longitudinal and transverse wave time differences of rocks;

[0078] (2) The indoor triaxial compression method is used to obtain the mechanical parameters of rock cohesion, internal friction angle and compressive strength;

[0079] (3) The acid solution was circulated through the core end face of the rock sample, and the effect of acidification on rock mechanical characteristics was analyzed by indoor triaxial compression method, including the mechanical parameters of rock cohesion, internal friction angle and compressive strength after acidification.

[0080] (4) Based on the results of ultrasonic transmission experiments and triaxial compression mechanics experiments in steps (1) and (2), obt...

Embodiment 2

[0104] The method for optimizing the completion mode of horizontal wells in low-permeability gas reservoirs provided in this example, referring to the flow chart shown in Figure 11, includes the following steps in sequence:

[0105] (1) The mechanical parameters of rock tensile strength, rock compressive strength, cohesion and internal friction angle were obtained by indoor triaxial compression method and Brazilian splitting method;

[0106] (2) Soak the rock samples in acid solution, and use the indoor triaxial compression method to analyze the influence of acidification on rock mechanical characteristics, including the mechanical parameters of rock compressive strength, cohesion and internal friction angle after acidification. The test results are shown in Table 1 with reference to:

[0107] Table 1 Changes of mechanical parameters of rock samples before and after acidification

[0108] Rock Mechanics Parameters Before acidification after acidification Un...

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Abstract

The invention provides a design method of low-permeability reservoir or gas reservoir well completion engineering and relates to the technical field of petroleum and natural gas engineering. The method comprises the following steps of establishing a rock strength profile; establishing a critical production differential pressure model; and determining a horizontal well completion mode. Through thedesign method of the low-permeability reservoir or gas reservoir well completion engineering, provided by the invention, logging information and laboratory experiments are integrated to form the low-permeability reservoir or gas reservoir horizontal well completion optimization method to facilitate high-efficiency exploitation of reservoir stratum oil and gas resources. The systematic horizontal well completion optimization method is formed through the method. Through the design method, the productivity of a horizontal well can be increased, and the service life of the horizontal well can be prolonged.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas engineering, in particular to a design method for a low-permeability oil reservoir or gas reservoir completion project. Background technique [0002] Low-permeability oil and gas reservoirs are one of the main positions for future exploration and development in my country. Low-permeability oil and gas reservoirs account for an increasing proportion of oil and gas resources, and have gradually become the key areas of global oil and gas development. Among the low-permeability oil and gas reservoirs, my country's low-permeability sandstone gas reservoirs are rich in resources, which is a key field of natural gas exploitation. At present, in the development of low-permeability sandstone gas reservoirs, horizontal wells are often used to develop stimulation measures such as acidification and fracturing, and the quality of horizontal well completion methods directly affects the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/22E21B47/00E21B47/06G06Q50/02
CPCE21B43/16E21B47/00E21B47/06G06Q50/02
Inventor 梁利喜熊健刘向君范志利
Owner SOUTHWEST PETROLEUM UNIV