The main controlling factors for production and the comprehensive evaluation model of dessert area of coalbed methanein Guizhou Province

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  • 1.Guizhou Unconventional Gas R&D Center,Guiyang 550081,China; 2.PetroChina Coalbed Methane Company Limited,Beijing 100028,China; 3.Qinghai Oilfield Company Sebei Operating Company,Golmud 816000,China; 4.Hancheng Coal Bureau of Shaanxi Province,Hancheng 715400,China

Received date: 2018-06-26

  Revised date: 2018-08-23

  Online published: 2018-12-19

Abstract

The comprehensive evaluation method of high yield dessert area is of great importance to the regional exploration and develop mentand the increase of CBM capacity.The previous evaluation method was more focused on the resources enrichment conditions,whichhad de-emphasized the technical application of reservoir reconstruction and drainage gas recovery and it resulted in the selection failure.So how to optimize high yield dessert area from these resource enrichment regions is the key to restrict CBM industry development of Guizhou Province.Based on the production data,the analysis of all kinds of tests and the fracturing construction data,we start from the gas reservoir analysis and productivity prediction,surrounding the three aspects of the enrichment condition,reservoir flow conductivity and formation energy,deeply analyzed the impacting mechanism of the related factors and the influence degree to the capacity,and proposed the comprehensive evaluation index system which will influence the CBM enrichment and high yield to a great extent.At the same time we established acomprehensive evaluation model of the high-yield dessert area.Selecting 8 typically representative wells of each block in Guizhou to validate the reliability of the model,the results show that the relative order of comprehensive evaluation results is in good agreement with the gas well productivity.

Cite this article

Yang Xiao-ying, Li Yong-chen, Zhu Wen-tao, Huang Ji-yong, Shan Yong-le, Zhang Qiang . The main controlling factors for production and the comprehensive evaluation model of dessert area of coalbed methanein Guizhou Province[J]. Natural Gas Geoscience, 2018 , 29(11) : 1664 -1671 . DOI: 10.11764/j.issn.1672-1926.2018.08.004

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