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Method for using negative pressure perforation technology for realizing pressure recovery well logging interpretation

A technology of negative pressure perforation and logging interpretation, which is applied in the directions of measurement, production of fluids, and earth-moving drilling, etc., can solve the problems of prolonging the completion period, secondary downhole pollution, and testing time lag, reducing labor intensity and shortening Completion time, pollution reduction effect

Inactive Publication Date: 2015-01-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the negative pressure perforation technology (1) The test time lags, and it is impossible to obtain the formation information of the reservoir at the initial stage after perforation
(2) For negative pressure perforation, it is impossible to obtain the change of initial formation pressure at the moment of perforation and within a period of time, and it is impossible to analyze the rationality of the negative pressure value design of completion perforation
(3) Going down the well twice will easily cause pollution in the second downhole. At the same time, the operation time, manpower and material resources will be increased, the completion cycle will be prolonged, and the measured data will not be accurate enough. Transformation and innovation have been carried out

Method used

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  • Method for using negative pressure perforation technology for realizing pressure recovery well logging interpretation
  • Method for using negative pressure perforation technology for realizing pressure recovery well logging interpretation
  • Method for using negative pressure perforation technology for realizing pressure recovery well logging interpretation

Examples

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Effect test

Embodiment 1

[0034] Well He 60-Xie 45 is a new well in a high-pressure low-permeability reservoir in the Xianhe area. The average air permeability of the reservoir is 13.6 mD, the porosity is 18-23.5%, and the shale content is 14-28%. The well requires the use of negative pressure perforation, assisted pressure recovery test to obtain productivity and formation coefficient, and determine the next production plan. See Table 1 below for details.

[0035] Basic Data Table 1 of Well He 60-Xie 45

[0036]

[0037] (1) Negative pressure value: The pressure gauge is placed 60 meters above the perforating gun. The pressure before the perforating gun detonates is 14.2MPa, and the actual negative pressure is 16.2Mpa. (The factors such as well deviation are not considered). Such as figure 1 shown.

[0038](2) Formation pressure: The pressure in the oil layer before perforation was 14.2Mpa. After the perforating gun detonated, the formation fluid entered the wellbore. After about 1 hour of test...

Embodiment 2

[0044] Well He 183-1 is a new well in a high-pressure low-permeability reservoir in the Xianhe area in 2012. It is required to use negative pressure perforation and assist in pressure recovery tests to obtain productivity and formation coefficients and determine the next production plan. See Table 2 below for details.

[0045] Drilling Basic Data Table Table 2

[0046]

[0047]

[0048] (1) Negative pressure test situation

[0049] In March 2012, negative pressure continuous testing was carried out on the well. Before the perforating gun detonated, the pressure in the oil layer was 7.5MPa, and the actual negative pressure was 24.6Mpa. Such as Figure 5 shown.

[0050] After about 72 hours of testing, the formation pressure rose to 18.9MPa, and the packer was unsealed and the tubing was pulled out. During the period after perforation, the formation pressure increased by 11.4MP, and the liquid level in the tubing increased by 1140m (calculated based on the specific gra...

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Abstract

The invention discloses a method for using a negative pressure perforation technology for realizing pressure recovery well logging interpretation. The method comprises the steps that first, a negative pressure perforation tubular column capable of realizing a negative pressure perforation process is obtained; second, a storage type pressure and temperature instrument is connected to the position near a perforation gun on the negative pressure perforation tubular column, and continuously records temperature and pressure data obtained after perforation according to an oil deposit design; third, formation fluid flows into a shaft after the perforation gun is fired, the rising height of the liquid level inside an oil tube is continuously recorded and calculated, and the total amount of liquid flowing out of a formation is calculated; fourth, a perforating barrel string is taken out after a designed pressure test time; direct reading of the storage type pressure and temperature test data is conducted through software, and various well logging interpretation data results are obtained finally. The method can realize perforation and pressure recovery tests by placing the tubular column for one time, conduct well logging interpretation to obtain various stratum parameters, shorten the formation testing time, avoid pollution to a hydrocarbon reservoir and provide guiding advice and strong data support for following oilfield development work.

Description

technical field [0001] The invention relates to a well logging interpretation technology after perforation of oil-water wells in new and old areas of oil field development, in particular to a method for realizing pressure recovery logging interpretation by using the negative pressure perforation technology. Background technique [0002] Perforation completion is an important link in oil and gas exploration and development system engineering. Perforation completion has developed from simply opening oil and gas layers at the beginning to liberating and protecting oil and gas layers today. With the advancement of oilfield development technology, the development of perforation technology and the optimization of perforation parameters, a variety of advanced perforation technologies have been developed, such as double compound perforation technology, internal blind hole perforation technology, hydraulic sandblasting perforation technology, multi-stage pulse synergistic perforation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/06E21B47/07E21B43/11
CPCE21B43/11E21B47/06E21B47/07
Inventor 郭志华赵海文肖淑明吕志强王利赵斌刘雪青刘志萍
Owner CHINA PETROLEUM & CHEM CORP
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