Guo Tonglou. Progress and research direction of deep shale gas exploration and development[J]. Petroleum Reservoir Evaluation and Development, 2021, (1): 1-6.
Guo Tonglou. Progress and research direction of deep shale gas exploration and development[J]. Petroleum Reservoir Evaluation and Development, 2021, (1): 1-6. DOI: 10.13809/j.cnki.cn32-1825/te.2021.01.001.
Based on the summary of deep shale gas breakthrough wells in recent years
four geological characteristics of deep shale gas are put forward. First
the basic evaluation parameters of deep and shallow shale are similar
but gas content and porosity of deep shale are generally higher than those of medium-deep shale. Second
the horizontal stress difference of deep shale is much greater than that of medium-deep shale. Third
deep shale gas in the basin is generally overpressured
and the pressure coefficient is generally between 1.9 and 2.1
while the complex structure area at the edge of the basin is normally pressured. Fourth
the positive structure is still the main factor for high yield of deep shale gas. Based on the analysis of the decline characteristics of single well production curve in Haynesville and Barnett shale gas fields and the geological characteristics of deep shale gas in Sichuan Basin
three main problems of deep shale gas
namely theoretical understanding innovation
engineering process applicability as well as cost and benefit development. The corresponding countermeasures are also pointed out.