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Rocket power composite heat carrier throughput fluid diversion technique

A composite heat carrier and liquid flow diversion technology, which is applied in the fields of production fluids, wellbore/well components, and earth-moving drilling, etc., can solve the problems of enlarged swept volume, intensified interlayer plane contradiction, and low viscosity, and achieves multi-economy. Benefit, enlargement of sweep volume, effect of changing the direction of flow

Inactive Publication Date: 2014-07-16
PETROCHINA CO LTD +1
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AI Technical Summary

Problems solved by technology

In view of the good effect of the rocket-powered composite heat carrier huff and puff in the Toutai heavy oil block and the Lasaxing transition zone, the rocket-powered composite heat carrier huff and puff technology has been extended and applied to reservoirs after polymer flooding. The viscosity of nitrogen, CO2, water vapor and other components in the carrier is small, and fingering phenomenon is more likely to occur than water. At the same time, after polymer flooding, the heterogeneity of the reservoir deteriorates, the interlayer and inner plane conflicts intensify, and the injected rocket power recombines The heat carrier is prone to channeling. For this reason, whether the liquid flow diversion can be effectively realized, and the expansion of the swept volume is the key process for the success of the technology after polymer flooding. The conventional liquid flow diversion process cannot meet the long-term effective Change the direction of liquid flow, unable to expand the affected volume

Method used

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  • Rocket power composite heat carrier throughput fluid diversion technique
  • Rocket power composite heat carrier throughput fluid diversion technique
  • Rocket power composite heat carrier throughput fluid diversion technique

Examples

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Embodiment 1

[0018] Example 1. Liquid flow diversion process before huff and puff in well B2-D4-P29:

[0019] Due to the severe heterogeneity of the oil layer after polymer flooding and the development of high-permeability strips, in order to prevent the injection of composite heat carriers from ineffective and inefficient circulation along the high-permeability zones, prevent gas channeling, expand the swept volume, and improve oil displacement efficiency, the compounding Before the heat carrier huff and puff, it is necessary to carry out liquid flow diversion process construction on the test well group.

[0020] The three injection wells connected to B2-D4-P29 are B2-D4-P30, B2-D4-P28 and B2-4-P30 respectively. The connection status of the well group is as follows: figure 1 shown by figure 1 , Table 1 shows that B2-D4-P29 and B2-D4-P28 have a high connectivity rate and a large connectivity thickness, followed by well B2-4-P30 with better connectivity, and poorer connectivity with B2-D4-...

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Abstract

The invention relates to a rocket power composite heat carrier throughput fluid diversion technique. The technique includes the steps: (1) determining a fluid channeling direction and fluid channeling layer thickness; (2) optimizing total dosage of a fluid diversion agent by means of numerical simulation; (3) injecting 10% of high-temperature-resistant particle slugs, injecting 20% of high-temperature-resistant particle and gel mixed slugs, injecting 20% of high-temperature-resistant gel slugs, injecting 20% of high-temperature-resistant gel and foam fixed slugs, injecting 20% of high-temperature-resistant foam slugs, and injecting 10% of high-temperature-resistant particle slugs in sequence according to the dosage, optimized in the second step, of the fluid diversion agent. By the rocket power composite heat carrier throughput fluid diversion technique, the fluid flow direction can be changed effectively for a long time at the temperature of 350 DEG C, swept volume is enlarged, and a slug combination mode is economical and feasible.

Description

Technical field: [0001] The invention relates to a liquid flow diversion process in the technical field of petroleum development, in particular to a rocket power composite heat carrier huff and puff liquid flow diversion process. Background technique: [0002] Since 2005, Daqing Oilfield has carried out field tests of rocket-powered composite heat carrier huff and puff on more than 90 wells in the Toutai heavy oil block and the Lasa Xing transition zone, and achieved good economic and social benefits. In view of the good effect of the rocket-powered composite heat carrier huff and puff in the Toutai heavy oil block and the Lasaxing transition zone, the rocket-powered composite heat carrier huff and puff technology has been extended and applied to reservoirs after polymer flooding. The viscosity of nitrogen, CO2, water vapor and other components in the carrier is small, and fingering phenomenon is more likely to occur than water. At the same time, after polymer flooding, the ...

Claims

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Application Information

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IPC IPC(8): E21B43/24
Inventor 王凤山王贤君张宗雨王鑫刘向斌韩重莲孙国辉王海静孟建勋李庆松
Owner PETROCHINA CO LTD
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