本文選題：頁巖氣 + 水平井　； 參考：《天然氣工業(yè)》2017年10期

【摘要】：頁巖氣開發(fā)的核心技術(shù)為水平井配合大型水力壓裂,而固井質(zhì)量不佳已成為頁巖氣完井和實施儲層改造的主要瓶頸問題。為此,以四川盆地頁巖氣開發(fā)區(qū)塊為例,探索了水力壓裂作用下保持水泥環(huán)力學完整性的方法及其配套工藝技術(shù)措施。研究結(jié)果表明:(1)采用模擬套管剛度的近鉆頭三扶正器通井鉆具組合,可以降低長水平段頁巖氣井套管下放難度,提高下套管時效和安全度;(2)研制的高效洗油沖洗隔離液體系在常溫至120℃下的沖洗效率均大于90%,能夠保證水泥漿對油基鉆井液的頂替效率和井壁的有效膠結(jié);(3)確定了該區(qū)長水平段固井韌性防竄水泥漿凝固后的性能——水泥石彈性模量應(yīng)小于7 GPa、三軸強度最好大于40 MPa,以減輕和避免壓裂時的水泥環(huán)破壞;(4)形成的鉆井液調(diào)整、預(yù)應(yīng)力固井、地面高壓泵注工藝等配套技術(shù)提高了頁巖氣井固井質(zhì)量。2015—2016年期間運用上述系列固井技術(shù)在四川盆地開展了85口井固井作業(yè),平均井深4 832 m,平均水平段長1 560 m,固井質(zhì)量優(yōu)質(zhì)率達89.58%;水平井固井后候凝期間無環(huán)空帶壓,鉆完井及試油期間環(huán)空氣竄得到明顯改善。結(jié)論認為,該配套技術(shù)可以保證并提高長水平段頁巖氣井的固井質(zhì)量。
[Abstract]:The core technology of shale gas development is horizontal well combined with large-scale hydraulic fracturing, and poor cementing quality has become the main bottleneck of shale gas completion and reservoir reconstruction. Therefore, taking the shale gas development block in Sichuan Basin as an example, the method of maintaining the mechanical integrity of cement ring under hydraulic fracturing and its supporting technological measures are explored. The results show that the casing transfer difficulty of shale gas wells in long horizontal section can be reduced by using the three-centralizer through drilling tool combination of near drill bit, which simulates the casing stiffness of the shale gas wells in the long horizontal section. The washing efficiency of high efficiency oil washing and isolating liquid system developed under normal temperature to 120 鈩，

本文編號：2003633