东营凹陷纯化油田西部侵入岩裂缝系统研究

Fracture system of irruptive rocks in the west of Chunhua Oilfield,Dongying Depression

针对东营凹陷纯化油田侵入岩裂缝发育的地质情况,利用常规地震资料、倾角测井资料和测井曲线,采用地震波相干技术、地震波属性分析技术和地层曲率法分析了火成岩裂缝的展布规律,形成了火成岩裂缝识别和追踪技术。距离断层较近或断层发育的构造顶部为裂缝最发育区,根据成因将裂缝分为早期收缩裂缝和晚期构造裂缝。通过对该区的成藏条件分析,提出了纯87-1小火成岩体内高部位和纯97小火成岩体南部2个有利钻探目标。

In view of the naturally fractured character of irruptive rocks in the Chunhua Oilfield of Dongying Depression, the techniques of seismic wave coherence, seismic-wave attribute analysis and strata curvature were applied to analyze the distribution rules of igneous rocks' fractures, and then the fractures identification and tracing technologies were developed based on the general seismic data, dipping logging data and logging curves. The structural highs with many faults or nearing faults are the most fracture-developed areas. The origin of fractures can be divided into two types; shrinkage fracture at early stage and tectoclase at late stage. By the analysis of conditions for hydrocarbon reservoir forming,the next exploratory targets are put forward at the high placement of Chun87-1 small irruptive rock and the south of Chun97 small irruptive rock.