High density fracturing fluid and preparation method thereof

A fracturing fluid, high-density technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of poor fracturing effect, limitation of displacement and sand ratio, etc., and achieves low cost, good effect, and reduced cost effect

Inactive Publication Date: 2013-08-07
HEBEI HUABEI PETROLEUM TIANCHENG IND GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the exploration and development depth of oil and gas reservoirs continues to increase, the wellhead pressure required for fracturing stimulation is getting higher and higher, and the technical challenges of reservoir stimulation for deep wells and

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0024] Specific embodiment 1, a kind of low-cost high-density fracturing fluid, the percentage by weight of each component is: 0.4% hydroxypropyl guar gum; 37% weighting agent, weighting agent is sodium nitrate; 0.2% multi-effect additive; 0.5% assistant Discharge agent; 0.4% cross-linking agent; 0.002%-0.1% ammonium persulfate; the rest is water; the sum of the weight percentages of each component is 100%.

specific Embodiment 2

[0025] Specific embodiment 2, a kind of low-cost high-density fracturing fluid, the percentage by weight of each component is: 0.45% hydroxypropyl guar gum; 40% weighting agent, wherein sodium nitrate: sodium bromide=5: 1; More than 0.2% 0.5% drainage aid; 0.4% cross-linking agent; 0.001%-0.1% ammonium persulfate; the rest is water; the sum of the weight percentages of each component is 100%.

specific Embodiment 3

[0026] Specific embodiment 3, a kind of low-cost high-density fracturing fluid, the percentage by weight of each component is: 0.45% hydroxypropyl guar gum; 42% weighting agent, wherein sodium nitrate: sodium bromide=3: 1; More than 0.2% 0.5% drainage aid; 0.4% cross-linking agent; 0.001%-0.1% ammonium persulfate; the rest is water; the sum of the weight percentages of each component is 100%.

[0027] In the above embodiment, the preparation steps of the fracturing fluid are:

[0028] 1. First add water to the large liquid mixing tank, add hydroxypropyl guar gum under circulation conditions, and circulate for 15 minutes with a large displacement;

[0029] 2. After the viscosity of the liquid is ≥60mPa·s, add the weighting agent, stir and dissolve completely, then circulate the non-ionic drainage aid, cross-linking regulator and antibacterial preservative for 10 minutes to make the liquid in the large tank uniform.

[0030] 3. During the fracturing construction, add 0.4% cross...

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PUM

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Abstract

The invention discloses a high density fracturing fluid and further provides a method for preparing the fracturing fluid. To solve the technical problem, the following technical scheme is adopted, wherein a formula of the high density fracturing fluid comprises, by weight, 0.4-0.5% of a thickening agent, 25-47% of a weighting agent, 0.2-0.4% of a multi-effect additive, 0.4-0.6% of a cleanup additive, 0.4-0.6% of a cross-linking agent, 0.001-0.1% of a gel breaker, and the balance of water.

Description

technical field [0001] The invention relates to the technical field of oilfield chemistry, in particular to a low-cost high-density fracturing fluid suitable for fracturing reconstruction of deep and abnormally high-pressure oil and gas reservoirs and a preparation method thereof. Background technique [0002] As the exploration and development depth of oil and gas reservoirs continues to increase, the wellhead pressure required for fracturing stimulation is getting higher and higher, and the technical challenges of reservoir stimulation for deep wells and ultra-deep wells are becoming more and more serious. The equipment and management of abnormal high pressure reservoir stimulation are not only It has a great safety risk, and the displacement and sand ratio are limited, resulting in poor fracturing effect. The present invention develops and optimizes the novel weighting agent-sodium nitrate and sodium bromide complex with cheap price, good weighting effect, and good compat...

Claims

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Application Information

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IPC IPC(8): C09K8/68
Inventor 崔会杰李建平余东合杜爱红车航崔培业
Owner HEBEI HUABEI PETROLEUM TIANCHENG IND GRP CO LTD
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