Site selection assessment method for water-bearing stratum underground gas storage

A gas storage and water layer technology, which is applied in the field of natural gas resource exploration and development, can solve problems such as scientific and effective evaluation of the location of underground gas storages that cannot aquifer, and achieves a scientific, effective, scientific and reasonable technical method for site selection and evaluation. Effect

Inactive Publication Date: 2014-12-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem that the existing technology cannot scientifically and effectively evaluate the site selection of the underground gas

Method used

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  • Site selection assessment method for water-bearing stratum underground gas storage
  • Site selection assessment method for water-bearing stratum underground gas storage
  • Site selection assessment method for water-bearing stratum underground gas storage

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122]Block D5 is geographically located in a township in central Hebei Province. The surface is a farmland area, involving several villages, 45km away from the natural gas pipeline network. This area is a weak earthquake area, and there have been no natural disasters such as earthquakes and floods in recent years. The structure is located in the Litan Sag on the east side of the Dacheng Uplift in a depression in North China. The reverse traction anticline structure controlled by the Dacheng East Fault develops along the downthrown wall of the Dacheng Fault. The top of the Ordovician and the top of the Carboniferous-Permian sandstone have clear anticline shapes, and the long axis strikes northeast.

[0123] The Permian trap area of ​​D5 block is about 12km 2 , the closure range is 150m, and the buried depth of the top surface is 2285m, see Figure 5 . The quality of the 2D seismic data is good, the confirmation degree of the trap is 90%, the structure is relatively confirmed...

Embodiment 2

[0125] The Ordovician trap area in block D5 is about 4.1km 2 , the closure range is 50m, and the buried depth of the top surface is 3075m, see Figure 6 . The quality of 2D seismic data is average, and the degree of confirmation of traps is low. Whether effective traps are formed depends on the sealing performance of faults. The Ordovician target layer is mainly limestone and dolomite, with a total thickness of 198.6m, a porosity of 3.5-7.5%, and a permeability of 0.12-2.0mD; the daily water production of the test well is 33.7m 3 , accumulative water production 111m 3 . The Ordovician overlying the Carboniferous Benxi Formation-Taiyuan Formation (3047m-3085m) is dominated by mudstone and coal rock, with a thickness of 38m, which is a good caprock.

[0126] The above-mentioned relevant information and data were summarized, sorted and screened according to the index parameters required for site selection and evaluation of aquifer gas storage, and the specific evaluation inde...

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Abstract

The invention discloses a site selection assessment method for a water-bearing stratum underground gas storage and belongs to the technical field of natural gas resource exploration and development. The method comprises the steps that suitability degrees corresponding to technical indexes of candidate sites of the water-bearing stratum gas storage are obtained according to the site selection technology, the geology safety, the economy and the social environment characteristic; an analytic hierarchy process is adopted for determining weight values of all the technical indexes; according to the suitability degrees corresponding to all the technical indexes and the weight values of all the technical indexes, the comprehensive storage construction suitability degree of each candidate site of the water-bearing stratum gas storage is obtained; the assessment result is obtained according to a preset classification list of the suitability degrees of the site selection indexes of the water-bearing stratum gas storage. According to the method, the technical principle, the determining method and steps of the site selection of the water-bearing stratum underground gas storage are defined, the measurability is high, and the scientific and reasonable technical method is provided for exploration and construction of the water-bearing stratum gas storage.

Description

technical field [0001] The invention relates to the technical field of exploration and development of natural gas resources, in particular to a site selection and evaluation method for underground gas storage in aquifers. Background technique [0002] As a clean energy, natural gas has been widely used in civil and many industrial fields due to its economy and environmental protection. The consumption of natural gas in cities and other industrial sectors often shows obvious peaks due to different seasons. Due to its irreplaceable role in peak regulation and ensuring the safety of gas supply, the construction of underground gas storage has gradually received more and more attention. national attention. [0003] Aquifer gas storage and depleted oil and gas reservoir gas storage are two important types of porous underground gas storage. my country's oil and gas reservoirs are mainly enriched in continental strata, and the scale of oil and gas reservoirs is relatively small. Ut...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
Inventor 贾善坡张辉林建品魏强闫爱华刘团辉席增强崔丽华王娅妮毕扬扬
Owner PETROCHINA CO LTD
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