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A kind of fracturing production method of high waxy oil layer

A production method and oil layer technology, which are applied in the fields of production fluids, chemical instruments and methods, earthwork drilling and production, etc., can solve the problems of low recovery rate of heavy oil reservoirs, etc.

Active Publication Date: 2021-10-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of fracturing production method of high waxy oil layer, to solve the problem of low recovery rate of heavy oil reservoir of high waxy oil layer in the prior art

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  • A kind of fracturing production method of high waxy oil layer
  • A kind of fracturing production method of high waxy oil layer
  • A kind of fracturing production method of high waxy oil layer

Examples

Experimental program
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Effect test

Embodiment 1

[0078] The fracturing method of the high waxy oil layer of the present embodiment comprises the following steps:

[0079] (1) Well selection

[0080] Select the Ebi 1 well with the following characteristics:

[0081] A. The straight-line spacing between the production well and the steam-injected well that provides driving energy for production is 149m.

[0082] B. In the last cycle of the oil well, the boring time before the well was opened for production was 38 days, the production cycle before production was 29 days, and the daily oil production was 0.9 tons / day.

[0083] C. The well deviation of the oil well ranges from the kickoff point to the target layer after drilling, and the deviation of the oil well is 41°.

[0084] The reservoir and crude oil corresponding to the selected oil well have the following characteristics:

[0085] a. Reservoir thickness 1m, porosity 10%, permeability 9μm 2 , Oil saturation 31%;

[0086] b. The oil layer temperature is 80°C;

[0087]...

Embodiment 2

[0124] The fracturing method of the high waxy oil layer of the present embodiment comprises the following steps:

[0125] (1) Well selection

[0126] Select Well Wang 12 with the following characteristics:

[0127] A. The linear spacing between the production well and the steam-injected well that provides driving energy for production is 120m.

[0128] B. In the last cycle of the oil well, the boring time before the well was opened for production was 49 days, the production cycle before production was 22 days, and the daily oil production was 0.8 tons / day.

[0129] C. The well deviation of the oil well is within the range from the kickoff point to the target layer after drilling, and the deviation of the oil well is 55°.

[0130] The reservoir and crude oil corresponding to the selected oil well have the following characteristics:

[0131] a. Reservoir thickness 2m, porosity 8%, permeability 8μm 2 , Oil saturation 33%;

[0132] b. The oil layer temperature is 70°C;

[01...

Embodiment 3

[0167] The fracturing method of the high waxy oil layer of the present embodiment comprises the following steps:

[0168] (1) Well selection

[0169] Select double H9-187 wells with the following characteristics:

[0170] A. The linear spacing between the production well and the steam-injected well that provides driving energy for production is 89m.

[0171] B. The boring time of the oil well in the last cycle before production was 67 days, the production cycle before production was 20 days, and the daily oil production was 0.5 tons / day.

[0172] C. The inclination of the oil well is within the range from the kickoff point to the target layer after drilling, and the inclination of the oil well is 61°.

[0173] The reservoir and crude oil corresponding to the selected oil well have the following characteristics:

[0174] a. The thickness of the oil layer is 5m, the porosity is 6%, and the permeability is 7μm 2 , The oil saturation is 35%;

[0175] b. The oil layer temperat...

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Abstract

The invention relates to a fracturing mining method for a high-waxy oil layer, belonging to the technical field of oil and gas mining. The fracturing production method of the high-waxy oil layer of the present invention comprises the following steps: heating the pretreatment liquid to a set temperature, injecting the oil layer to treat the wax and colloidal substances in the near-well zone; injecting the pre-fluid into the oil layer to manufacture artificial fractures; Then inject sand-carrying fluid into the oil layer to fill artificial fractures; then inject displacement fluid into the oil layer to pump the unpumped formation proppant into the formation; steam injection, production. The fracturing production method of the present invention aims at the characteristics of high wax content and high freezing point of the high-waxy oil layer. The pretreatment liquid is heated first and then injected into the oil layer, which offsets the temperature drop of the pretreatment liquid when it enters the formation and reduces wax formation. phenomenon occurs. Moreover, the viscosity of the fluid is reduced, the flowback efficiency is improved, and the oil production of the high-wax oil layer is improved as a whole.

Description

technical field [0001] The invention relates to a fracturing mining method for a high-waxy oil layer, belonging to the technical field of oil and gas mining. Background technique [0002] With the deepening of oil exploration and development, it is more difficult to find high-quality oil reserves. How to improve the development effect of heavy oil reservoirs with high wax content and high freezing point, and improve the recovery factor has become a top priority. Henan Oilfield is rich in heavy oil reservoir resources. The reservoirs have the characteristics of low permeability, thin reservoirs, and thick crude oil. Wax deposition and serious blockage in the wellbore during production are factors that restrict the economical and effective development of such reservoirs. [0003] The Chinese invention patent application with the application publication number CN102733789A provides a method for increasing production by hydraulic staged fracturing in thick sandstone reservoirs ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/26E21B37/06C09K8/58
CPCC09K8/58E21B37/06E21B43/26
Inventor 李梦楠刘欣张桂荣杨琪郑桐周文玉马海
Owner CHINA PETROLEUM & CHEM CORP
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