Multi-element medium composite huff and puff development method for heavy oil reservoir

A heavy oil reservoir, multi-component technology, applied in chemical instruments and methods, production fluids, earthwork drilling, etc., can solve the problems of low production degree of oil layer profile, short effective production period, serious gas channeling between wells, etc. The effect of formation energy, improving cycle oil production and reducing crude oil viscosity

Pending Publication Date: 2021-07-23
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a multi-media composite huff and puff development method for heavy oil reservoirs to solve the problem of severe steam channeling between wells, low pro

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] Take the wind city heavy oil reservoir as an example, the specific multi-dielectric composite throughput development process is as follows:

[0032] A1 well porosity is 31.3%, the oil layer thickness is 13 meters;

[0033] Turning the wheel oil well in sequence into 10M 3 The front liquid (which includes a polymer, a crosslinking agent, and a stabilizer, the polymer is a polyacrylamide, the crosslinking agent is organic chromium, the stabilizer is a clay; the weight ratio between the polymer and the crosslinking agent is 100: 1 ;), 319m of the main body 3 (Silicate inorganic ancillation system GK-01, including silicate and stable dispersing agent), the top of the liquid cleaned 15m 3After the diffusion pressure for 30 minutes, the anti-washing is 36 hours after 1 week;

[0034] Then squeezed into 14 tons of tackifier SDCY (1: 7.5 solution of water absorbent and water), 1.6 ton α-olefin sulfate (foaming agent and urea)Using 60 ° C hot water);

[0035] Fina...

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Abstract

The invention provides a multi-element medium composite huff and puff development method for a heavy oil reservoir. The method comprises the following steps of injecting a high-temperature plugging agent into a stratum; after the high-temperature plugging agent is condensed, injecting a viscosity reducer, a foaming agent and non-condensate gas, or injecting the viscosity reducer, the foaming agent and urea; and finally, injecting steam into the stratum. According to the method, multi-element media such as the high-temperature plugging agent, the viscosity reducer, the foaming agent and the non-condensate gas (or urea) are sequentially injected into the bottom layer before the steam is injected, so that the purposes of improving the production degree of an oil layer profile, reducing the viscosity of crude oil, supplementing stratum energy, improving periodic oil production and the oil-steam ratio, improving the oil reservoir recovery efficiency and increasing economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of oil reservoir exploitation, in particular to a multi-media composite huff and puff development method for heavy oil reservoirs. Background technique [0002] Currently, heavy oil thermal recovery development methods mainly include steam huff and puff, steam flooding, and fire flooding. Steam huff and puff is a relatively simple and mature heavy oil development method that first injects a certain amount of steam into the oil well, shuts the well for a period of time, and waits for the thermal energy of the steam to spread to the oil layer, and then opens the well for production. The process of steam huff and puff operation can be divided into three stages, namely, steam injection, soaking well and recovery. In the process of steam huff and puff development, there are serious steam channeling between wells, low production degree of oil layer section, high viscosity of crude oil and short effective productio...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21B43/24E21B43/22C09K8/512
CPCE21B33/13E21B43/24E21B43/16C09K8/512
Inventor 卢迎波桑林翔吕柏林马鹏胡鹏程杨兆臣王怀武赵长虹邢向荣张宝真杨若姣
Owner PETROCHINA CO LTD
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