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One-trip string two-layer layering perforation-layering testing combining tubular column and operation method thereof

A layered testing and pipe string technology, which is applied in the field of testing pipe strings and two-layer perforation of oil and gas wells, can solve the problems of not saving the final shut-in time, difficult to record small layers, and short construction period, etc., so as to facilitate oil testing Increase the speed and efficiency, realize the effect of increasing the speed and efficiency of oil testing, and increase the proportion of layered oil testing

Active Publication Date: 2016-11-23
DAQING DANFENG PETROLEUM TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the shortcomings of the multi-pass string perforation test method described in the background technology, there are disadvantages such as long period, slow speed, high cost, and the difficulty in recording the production capacity, fluidity, and pressure recovery curve data of each small layer in the multi-layer perforation test method, and the existing There are problems such as "one string multi-layer layered perforation-separate measurement string" can not save the final shut-in time of the first layer test, the purpose of the present invention is to provide a two-layer layered perforation- The combined operation of the layered test string can realize the layered perforation of two layers and the combined operation of the layered test with one trip of the string, which has the outstanding advantages of short construction period and low cost

Method used

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  • One-trip string two-layer layering perforation-layering testing combining tubular column and operation method thereof
  • One-trip string two-layer layering perforation-layering testing combining tubular column and operation method thereof
  • One-trip string two-layer layering perforation-layering testing combining tubular column and operation method thereof

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Embodiment Construction

[0041] In order to disclose the purpose, technical means and technical effects of the present invention more completely and clearly, the following is a detailed description, and please refer to the accompanying drawings and component numbers.

[0042] The invention provides a reasonable and compact sealing layer shut-in sampling valve, such as figure 2 shown. Please refer to the following Figure 2-4 , the sealing layer shut-in sampling valve 16 of the present invention can be connected to the described two-layer layered perforation-layered test combined pipe string, which is a multi-layer tubular body, and the sealing layer shut-in sampling valve is radially It has an outer layer, a middle layer and an inner layer, and the outer layer is connected with an upper joint 101, an air cavity joint 106, a ball valve outer cylinder 108, a lofting valve joint 117, a lower joint 118, and an air cavity joint 106 from top to bottom in the axial direction. The outer wall is provided wi...

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Abstract

The invention relates to a one-trip string two-layer layering perforation-layering testing combining tubular column and an operation method. The tubular column comprises a first oil tube, a depth correction short joint, a second oil tube, a circulating valve, a third oil tube, a testing valve assembly, a second pressure gauge supporting cylinder, a second pressure transfer joint, a straddle packer, a second sieve tube, a spacer tube, a pressure guiding joint, a second ignition head, a second perforating gun, a pressure release device, sealing layer well shut-in sampling valve, a damping pressure gauge supporting cylinder, a first pressure transfer joint, an anchor packer, a first sieve tube, a shock absorber, a fourth oil tube, a first ignition head, a first perforating gun, a pressure relieving device, a second inner pressure transfer tube, a first pressure transfer tube and a first outer pressure transfer tube. The sealing layer well shut-in sampling valve is located between the second perforating gun and the anchor packer. The damping pressure gauge supporting cylinder is located below the sealing layer well shut-in sampling valve. by adopting the tubular column, two-layer layering perforation and layering testing combination can be completed, final well shut-in of the first layer does not need to occupy the operation machine time independently, down-hole sampling is convenient, and the tubular column has the advantages of being short in period, low in cost and the like.

Description

technical field [0001] The invention relates to an oil and gas well two-layer perforation, testing pipe string and its operation method, in particular to a pipe string two-layer delamination perforation-delamination testing joint operation pipe string and its operation method. Background technique [0002] In test oil and gas wells, for the realization of perforation test technology in multi-layer operation, layered multi-pass perforation test is generally adopted, or multi-layer mixed test is performed after simultaneous perforation of several adjacent formations by one string Way. The disadvantage of multi-pass perforation test method is that the strings are lifted and lowered multiple times, resulting in long perforation test cycle, slow speed, high cost, and easy pollution to oil and gas layers; The production capacity, fluidity, pressure recovery curve and other data of the small layer affect the conclusion of oil testing and the accurate characterization of the reserv...

Claims

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Application Information

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IPC IPC(8): E21B43/11E21B34/06E21B33/12
Inventor 张路铭
Owner DAQING DANFENG PETROLEUM TECH DEV CO LTD
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