岑页1井试气影响因素探讨

岑页1井是国土资源部在黔北地区部署的第一口超千米的页岩气探井,是在地质资料相对少的条件下进行井位部署和完钻的,通过井口改装和充分论证进行了水力压裂试气,虽然压裂施工顺利实施并实现了出气点火的基本目标,但没有达到工业气流。主要原因是前期地质研究不够,井区页岩气保存条件较差,且处在天然裂缝的破碎带上,导致大量出水。该井的钻探和压裂试气,证明了黔北下寒武统牛蹄塘组页岩曾经大量生气,只要找到保存条件好、地层稳定、埋深适中的有利区,应该具备工业生产潜力。

Discussion on influential factors of test gas in Cenye-1 well

Cenye-1 well is one of the first shale gas exploration wells over kilometers deployed in the North Guizhou area by Ministry of Land and Resources and it was drilled and deployed under relatively weak geological conditions.Through the wellhead conversion and full demonstration,the hydraulic fracturing on test gas has been carried out.Although the fracturing construction was smooth and realized the basic objective of outlet ignition,the commercial gas flow cannot be achieved.The main reasons are as the follows:the preliminary geological research is not enough,storage conditions of shale gas in well area is poor and it is on the natural fractures of the broken belt,resulting in a lot of water.The well drilling and fracturing gas test proved Niutitang shale in lower Cambrian once generated gas.If a favorable area of moderate depth,agood preservation condition and stable formation can be found,there is a good potential on commercial gas flow.