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A sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application

A technology for oil and gas reservoirs and sand control, which is applied in earthwork drilling, wellbore/well components, production fluids, etc. It can solve the problems that the actual damage pattern of the formation cannot be included, and the formation filling pattern cannot be accurately grasped and judged, so as to reduce the near-wellbore Effects of flow resistance, reduced flow resistance, and increased pressure loss

Active Publication Date: 2021-07-20
CHINA UNIV OF PETROLEUM (EAST CHINA) +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to aim at the existing two extreme models of unconsolidated sandstone oil and gas reservoirs, which cannot include all the actual damage forms of the formation, especially for some reservoirs whose physical properties are between plasticity and brittleness, it is impossible to accurately grasp and judge the actual state of formation sand. To solve the problem of filling form and provide a sand control stimulation method for unconsolidated sandstone oil and gas reservoirs and its application

Method used

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  • A sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application
  • A sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application
  • A sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application

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Embodiment 1

[0058] The method for sand control and production stimulation applied to loose sandstone oil and gas reservoirs with petrophysical properties between plasticity and brittleness includes the following steps:

[0059] (1) Pseudo-sand control and production stimulation mode and filling form: the near-wellbore zone close to the wellbore is in the plastic extrusion filling failure mode, and extrusion forms an annular columnar filling gravel layer with a certain thickness around the wellbore; outside the annular columnar gravel layer Fracture-packing zones extruded in the strata to form double wings, see figure 1 ; Realize the coexistence of the near-well plastic extrusion filling layer and the far-well fracture filling zone, which can not only effectively block sand, but also achieve high-efficiency stimulation.

[0060] (2) Discrimination of target reservoir adaptability: to determine whether the target reservoir is suitable for the sand control and production stimulation mode and...

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Abstract

The invention belongs to the technical field of oil and gas well development and exploitation, and in particular relates to a sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application. The sand control stimulation method for unconsolidated sandstone oil and gas reservoirs comprises the following steps: (1) proposed sand control stimulation mode and filling form; (2) target reservoir adaptability discrimination; (3) optimized design of process parameters; (4) ) to design pump injection construction procedures. This method provides a complete set of solutions, and the optimized and optimized sand control and production increase scheme can maximize its advantages, achieve the greatest production increase effect, and ensure the sand control effect.

Description

technical field [0001] The invention belongs to the technical field of oil and gas well development and exploitation, and in particular relates to a sand control and production increase method for unconsolidated sandstone oil and gas reservoirs and its application. Background technique [0002] In oil and gas reservoirs, unconsolidated sandstone and low permeability reservoirs are two main types of oil and gas reservoirs. Unconsolidated sandstone reservoirs are loosely cemented and easy to produce sand, so sand prevention and control measures need to be taken during mining; low-permeability reservoir rocks are densely cemented, have low permeability, and low natural production capacity, and hydraulic fracturing stimulation measures are required during mining. With the intensification of energy demand, fracturing and filling sand control technology is gradually introduced in the sand control technology of unconsolidated sandstone reservoirs, that is, the hydraulic fracturing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/04E21B43/267E21B49/00
CPCE21B43/04E21B43/267E21B49/00
Inventor 董长银刘亚宾宋洋赵益忠张雷李常友皇凡生王力智周博
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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