松辽盆地南部油气田钻井取心关键技术

Key technology for drilling and coring in southern Songliao Basin

摘要:

为有效解决松辽盆地南部油气田储集层取心钻头选型困难、机械钻速低和岩心收获率不稳定等难题，在分析取心井段地质特征、XRD元素组分占比、地层可钻性的基础上，开展了取心筒和岩心爪比选、取心钻头选型和个性化取心钻头的研制，同时优选取心钻具组合和优化取心参数，完善不同储集层取心工艺技术配套。比选后的取心工具配合新型取心钻头在多口井的取心实践中，取得了平均岩心收获率>98.98%、最高机械钻速达到6.03 m/h的效果。系列取心钻头优选和配套关键技术的应用解决了目前松辽盆地南部储集层取心的技术难题，可为后续取心提供可靠的参考和技术支持。

Abstract:

To effectively solve the southern Songliao Basin oil and gas reservoir core bit selection difficulties， low rate of penetration and unstable core recovery， the core barrel and the core lifter were compared and matched， the core bit type was selected and the case-dependent core bit was investigated through the analysis of the geological characteristics of the coring interval， the XRD element component proportion， and the formation drillability. The coring assembly and coring parameters were optimized， and the coring process for different reservoirs was improved. The selected coring tool and the new coring bit were used in multiple wells with the average core recovery more than 98.98%， and the highest mechanical drilling speed up to 6.03m/h. The application of the optimized series of coring bits and the complete key technologies has solved the technical difficulties in coring in the southern Songliao Basin reservoir， which can provide reliable reference and technical support for subsequent coring.