Morphological Analysis of Cavern Leaching of Horizontally Butted Wells

doi:10.11885/j.issn.1674-5086.2019.05.20.01

Abstract

Abstract: The shape of cavern leaching by horizontally directional butted wells can't be directly detected by the sonar detection equipment in service, and the unawareness of the shape is the main factor restricting the transformation and utilization of this kind of caverns. In order to solve this problem, sonar detection technology and leaching engineering technology are used, combined with the data of well drilling engineering, production data and salt layer insoluble content, the pit volume of the cavern is calculated, and the overall shape of cavern is constructed. The results show that the dissolution of horizontal directional butted wells mainly occurs in the vicinity of two wells, forming two cavities similar to single well dissolution. The free volume only exists near the two wells. There is only a narrow channel connecting the two wells. Most of the space are buried by insoluble substances, and the overall shape is U-shaped. The research results can guide the stability evaluation of cavern in horizontally directional butted wells and the design of transformation and utilization scheme, and effectively promote the transformation and utilization of this kind of cavern.

Key words: existing cavern, gas storage, sonar survey, horizontal segment of cavern, U-shaped cavern

CLC Number:

TE822

ZHOU Donglin, JIAO Yujia, DU Yujie, WANG Lidong. Morphological Analysis of Cavern Leaching of Horizontally Butted Wells[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2021, 43(1): 142-148.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2019.05.20.01

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2021/V43/I1/142

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