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Deep brine exploration and extraction combination technology

A kind of brine and deep layer technology, applied in the field of deep brine exploration and production combined technology, can solve the problems of complex ore-hosting strata, difficulty in realizing layered evaluation of brine resources, and waste of well hole resources, so as to improve the efficiency of drilling wells and avoid mutual mixed pollution , Reduce the effect of inaccurate data

Active Publication Date: 2020-04-17
江苏长江地质勘查院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Usually, the following problems will be encountered during the construction of brine potash salt mine exploration wells: the buried depth of the brine potash salt mine is large, and the deepest can reach more than 1500m; It is difficult to stop water in layers, and it is difficult to evaluate brine resources in layers, and the construction period is long. The construction period of a single well often reaches more than 5 months; Reuse, resulting in waste of wellbore resources
These problems will greatly push up the cost of deep brine exploration and development, and restrict the exploration and development of deep brine potassium deposits

Method used

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  • Deep brine exploration and extraction combination technology
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  • Deep brine exploration and extraction combination technology

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Such as Figure 1-6 As shown, the present invention is a combination process of exploration and production of deep brine, comprising the following steps.

[0030] (1) Drilling steps

[0031] The core is taken from the whole hole with a hole diameter of 216mm to the bottom. During the coring process, mud with a specific gravity of 1.65 is used to protect the wall and suppress the high-pressure water gushing layer, so that the well wall is stable and the mud circulates normally.

[0032] (2) Measuring steps

[0033] After coring and drilling to the final hole, full-hole logging is carried out to measure relevant indicators.

[0034] (3) Reaming step.

[0035] After the logging is completed, the divisional depth positions of each aquifer section are determined through comprehensive analysis of core records, well logging, and geological profile data, and then reaming is performed with reaming bits of different apertures according to the divided depths of each aquifer sec...

Embodiment 2

[0063] In Example 1, the W 1 Water section, W 2 Water section, W 3 The reaming diameters of the water-containing sections were changed to 152mm, 216mm, and 311mm, respectively, and the casing diameters were changed to 127mm, 168mm, and 245mm, respectively. The same as in Example 1 except that. The well-formed well diameter and pipe matching table of embodiment 1 and embodiment 2 are shown in table 1.

[0064] Table 1

[0065]

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PUM

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Abstract

The invention discloses a deep brine exploration and mining combination technology. The deep brine exploration and mining combination technology comprises a hole drilling step, a hole measuring step,a hole expanding step, a well forming step, a water-sealing step, a well washing step, a water pumping step and a brine extracting step, wherein a water seal in the water sealing step includes an in-pipe water seal and an outer-pipe water seal. The deep brine exploration and extraction combination technology has the advantages that the water-sealing effect is excellent, the well forming efficiencyis improved, the costs are reduced, and the exploration and extraction combination is realized.

Description

technical field [0001] The invention belongs to the field of hydrogeological drilling, and in particular relates to a deep brine exploration and production combined process. Background technique [0002] As the exploration and development of brine potash mines in western my country gradually develops to the deep, the complexity of ore beds and formations makes the original drilling technology that can be used for shallow exploration unable to be effectively used for deep exploration and development. In recent years, in the deep brine exploration and development activities in western my country, the well drilling process has become a bottleneck restricting the exploration and development work, especially when evaluating brine resources in multiple layers, it is difficult to stop water in layers. [0003] Usually, the following problems will be encountered during the construction of brine potash salt mine exploration wells: the buried depth of the brine potash salt mine is lar...

Claims

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Application Information

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IPC IPC(8): E21B43/28E21B7/28E21B7/20E21B33/134E21B17/08E21B33/12
CPCE21B43/28E21B7/28E21B7/20E21B33/134E21B17/08E21B33/12
Inventor 甘会春刘占勇周瑞巫修平李杨闫敏兰天
Owner 江苏长江地质勘查院
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