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Device and method for acid exciting of underwell structure layer

A stratum and equipment technology, applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc., can solve problems such as reducing hydrostatic effect, large friction coefficient of foam, and increasing pressure required for treatment wells

Inactive Publication Date: 2006-10-18
HALLIBURTON ENERGY SERVICES INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But foam has a much higher coefficient of friction and reduces the hydrostatic effect, both of which seriously increase the pressure required to treat the well

Method used

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  • Device and method for acid exciting of underwell structure layer
  • Device and method for acid exciting of underwell structure layer
  • Device and method for acid exciting of underwell structure layer

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0015] refer to figure 1 , shows a stimulation device according to an embodiment of the present invention installed in an underground vertically extending wellbore 10 penetrating a subterranean formation 12 producing hydrocarbons. A casing 14 extends from the surface (not shown) into the wellbore 10 and terminates above the formation. The stimulation apparatus includes a working string 16 in the form of tubing or coiled tubing extending from the surface through the casing 14 . as from figure 1 As seen in , a working string 16 extends beyond or below one end of the casing 14, and one end of the working string 16 is coupled to one end of a tubular spray sub 20 in a manner to be described. The jet fitting has a plurality of through-holes 22 machined through its wall, forming discharge jets as will be described in detail below.

[0016] A valve connector 26 is coupled to the other end of the spray connector 20 in a manner that will also be described. As will be described in de...

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PUM

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Abstract

The invention relates to a method and equipment for acidizing underground formations and increasing production. These include positioning a plurality of nozzles in spaced relation to the walls of the formation, forming an annulus between the nozzles and the formation, and pumping acid-containing stimulation fluid under pressure through the nozzles into the annulus against the walls of the formation, A gas is pumped into the annulus to mix the stimulation fluid with the gas, creating foam before the mixture is sprayed into the formation to impact the formation wall.

Description

technical field [0001] The present invention relates to a method and apparatus for treating subterranean well formations to increase the production of hydrocarbons. Background technique [0002] Various techniques have been developed for treating subterranean well formations to increase hydrocarbon production. For example, a hydraulic fracturing method is often used, according to which a portion of a stimulated formation is separated with a conventional packer or the like, and a stimulation fluid containing gel, acid, mortar, etc. is pumped through the wellbore into the separated portion of the formation . The pressurized stimulation fluid pushes against the formation with a very high force, creating and propagating fractures in the formation. But the requirement to separate the formation with packers is time consuming and adds considerably to system cost. [0003] Squeeze methods have also been used, which involve introducing acid-containing stimulation fluids into carbo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/27B05B7/00C09K8/74E21B43/25E21B43/26
CPCC09K8/74E21B43/255E21B43/27
Inventor 阿利克·陈吉姆·B·苏亚阿马查马修·J·里斯亚拉伯罕·哈拉德基思·里斯普勒
Owner HALLIBURTON ENERGY SERVICES INC
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