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Process for fracturing energetic gas

A high-energy gas fracturing and fracturing technology, applied in the field of fracturing, can solve problems such as short validity period of measures, and achieve the effects of improving treatment effect, preventing closure and prolonging validity period

Inactive Publication Date: 2008-08-27
ANTON OILFIELD SERVICES (GRP) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although high-energy gas fracturing has formed many radial radial fractures, the fractures formed by high-energy gas fracturing currently used cannot be filled with proppant like hydraulic fracturing, so under the action of surrounding rock and closure pressure, the fractures are very fragile. Closes quickly, resulting in a short-lived measure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] When the high-energy gas fracturing construction pipe string is lowered to 50 meters away from the target layer, the pipe string is suspended; then the surface pipeline is connected, and the prepared sand-carrying fluid with proppant is pumped from the oil casing annulus at a low speed. The sand-carrying liquid is a quaternary ammonium salt surfactant of 1% (weight) long-chain fatty acid, and the proppant weight content is 25% in the sand-carrying liquid, and the proppant density is 1200Kg / m 3 , the particle size is 0.9-1.2mm, the proppant used is purchased from the market, the sand-carrying liquid is injected at a speed of 150L / min, and the oil casing annulus is filled; then the construction pipe string is lowered to the target layer, and the construction pipe string is seated. Detonate fracking.

Embodiment 2

[0021] When the high-energy gas fracturing construction pipe string is lowered to 40 meters away from the target layer, the pipe string is suspended; then the surface pipeline is connected, and the prepared sand-carrying fluid with proppant is pumped from the oil casing annulus at a low speed. The sand-carrying liquid is a quaternary ammonium salt surfactant of 2% (weight) long-chain fatty acid, and the proppant weight content is 20% in the sand-carrying liquid, and the proppant density is 1200Kg / m 3 , the particle size is 0.9-1.2mm, the proppant used is purchased from the market, and the sand-carrying liquid is injected at a speed of 190L / min to fill the oil casing annulus; then the construction pipe string is lowered to the target layer, and the construction pipe string is seated. Detonate fracking.

Embodiment 3

[0023] When the high-energy gas fracturing construction pipe string is lowered to 60 meters away from the target layer, the pipe string is suspended; then the surface pipeline is connected, and the prepared sand-carrying fluid with proppant is pumped from the oil casing annulus at a low speed. The sand-carrying liquid is a quaternary ammonium salt surfactant of 2.5% (weight) long-chain fatty acid, and the proppant weight content is 30% in the sand-carrying liquid, and the proppant density is 1200Kg / m 3 , the particle size is 0.9-1.2mm, the proppant used is purchased from the market, and the sand-carrying fluid is injected at a speed of 200L / min to fill the oil casing annulus; then the construction pipe string is lowered to the target layer, and the construction pipe string is seated. Detonate fracking.

[0024] Through the indoor simulation research test, it entered the field test in June 2007. A total of 11 wells were constructed, and the construction success rate was 100%. ...

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Abstract

The invention provides a method for fracturing high energy gas, comprising the following steps of: a. descending a high energy gas fracturing construction tube to a position which is 40 to 60m from a target layer and pausing the descending of the tube; b. injecting sand-laden fluid laden with proppant into a tubing-casing annular space; c. descending the construction tube to the target layer; d. igniting for fracturing. The method for fracturing the high energy gas of the invention can improve the construction effect for fracturing the high energy gas, and prolong the valid period of a measure.

Description

technical field [0001] The invention relates to a fracturing method, in particular to a high-energy gas fracturing method. Background technique [0002] As the production site progresses, the clogging of oil and water wells near the well is becoming more and more serious, and the seepage resistance continues to increase, which leads to a continuous decline in the production of oil wells or the water injection volume of water injection wells. Through the use of plugging removal measures to contact the blockages near the well, it can be recovered and improved. Oil well production or water injection well injection volume. High-energy gas fracturing is one of the efficient plugging removal measures for oil and water wells. [0003] High-energy gas fracturing is to use high-energy fracturing bombs to generate high-energy gas instantly at the bottom of the well deflagration, which can relieve the blockage of fractures and increase the opening degree of existing fractures. Radial...

Claims

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Application Information

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IPC IPC(8): E21B43/263
Inventor 张世甫
Owner ANTON OILFIELD SERVICES (GRP) LTD
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