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Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof

A technology for staged fracturing and horizontal wells, which is applied in wellbore/well components, earthwork drilling and production, and production fluids, and can solve problems such as limiting the effect of reservoir stimulation

Active Publication Date: 2013-04-03
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the staged fracturing of open-hole horizontal wells, only one sliding sleeve is installed in each isolation section, and only one main fracture may be formed during the fracturing operation, which greatly limits the effect of reservoir stimulation

Method used

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  • Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof
  • Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof
  • Open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and fracturing method thereof

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention will be described in further detail:

[0028] see figure 1 with figure 2 The multi-cluster sliding sleeve staged fracturing string for an open-hole horizontal well of the present invention includes a casing 18, a tubing 19 arranged inside the casing 18, a hanger 1, several open-hole packers 2 arranged on the tubing 19, 6, 7, 11, 12, several standard ball-opening sliding sleeves 5, 10, pressure-opening sliding sleeves 13, seat sealing ball seat 14, floating shoes 15, hydraulic power for fixing the oil pipe 19 in the casing 18 The anchor 16 and the insertion seal 17 are characterized in that every two open hole packers constitute a packer section II, III, wherein the last open hole packer 12 in the casing 18 is connected to the tail end of the casing 18 Constitute the first packing section I, each of the packing sections II and III is provided with a number of ball-throwing ope...

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Abstract

The invention discloses an open-hole horizontal well multi-cluster sliding sleeve staged fracturing string and a fracturing method thereof. According to the invention, a ball-throwing open type multi-cluster sliding sleeve is introduced on the basis of an existing mature open-hole horizontal well staged fracturing technology, wherein the main method comprises the following steps of: installing a plurality of groups of multi-cluster sliding sleeves in each packed-off interval, after finishing the installation, opening the plurality of groups of multi-cluster sliding sleeves step by step in a packed-off interval by throwing a ball, and matching with a standard ball-throwing open type sliding sleeve so as to isolate each fractured interval. According to the novel process, a plurality of major fractures can be formed in each packed-off interval, the reservoir transformation intensity is high, the drainage volume is expanded simultaneously, the defect that a sliding sleeve is mounted in each packed-off interval to form only one major fracture during the existing open-hole horizontal well staged fracturing is solved, the fracturing effect is greatly improved, and the yield of an oil-gas well can be furthest increased simultaneously.

Description

technical field [0001] The invention belongs to the technical field of staged fracturing of open-hole horizontal wells, and in particular relates to a multi-cluster sliding sleeve staged fracturing pipe string for open-hole horizontal wells and a fracturing method thereof. Background technique [0002] The current open-hole horizontal well staged fracturing technology is an organic combination of well completion technology and fracturing technology, forming a single string to realize two processes of completion and fracturing. The entry string is used as the completion string, At the same time, it is also used as a fracturing string, which reduces the construction cost, does not perform three-split cementing and perforation operations, greatly improves the completion time, and does not perform three-split cementing operations, avoiding the quality of horizontal well cementing bad question. The supporting pipe string structure of open-hole horizontal well staged fracturing t...

Claims

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Application Information

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IPC IPC(8): E21B43/26
Inventor 李军冯强李飞王瑶党伟李洪俊何志勇牛增前
Owner BC P INC CHINA NAT PETROLEUM CORP
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