苏53区块复杂地质条件下水平井入靶技术研究与应用

Research and application of horizontal well into target technology in Su 53 block under complicated conditions

针对苏53区块区域标志层少,河流相地层岩相变化大,区内完钻井少,微构造发育等特定复杂地质条件,开展了水平井入靶技术研究。通过综合利用方位角规律性变化辅助判断法、地层视厚度差辅助判断法和标志层法等可准确预测目的层顶界深度,适时控制井斜角,可确保水平井准确入靶。该研究成果成功应用于苏53区块,提高了水平井钻井成功率,并对同类型气藏水平井随钻地质导向具有借鉴作用。

Aiming at the specific complex conditions of Su 53 blocks, such as less marker beds, big variance of rock formation in fluvial facies, less drilled well and developed microstructures, the research of horizontal well into target technology has been carried out. By comprehensively using the auxiliary judgment methods of azimuth change rule and formation apparent thickness difference, and the marker beds method, the top boundary depth of marker beds can be accurately predicted, the hole deviation angle can be timely controlled and then the horizontal well can be accurately into the target. The research results have been successfully applied in Su 53 block, which improves the drilling success ratio of horizontal wells and provides reference and guidance for geosteering of horizontal wells sidetracking of similar type gas reservoirs.