油藏地质建模与数值模拟一体化技术在旅大4—2油田钻前优化及随钻调整中的应用

旅大4-2油田在ODP批准后进行了新的三维地震资料采集及处理,基于该油田新的油藏构造精细解释及储层反演成果,利用油藏地质建模与数值模拟一体化技术,建立起更精确的油藏模型代替ODP阶段的油藏模型,并在随钻过程中利用测井、录井等新资料及时更新油藏模型;在钻前及随钻过程中对油田开发方案进行了优化与调整,如井型优化,边部水平井距内含油边界距离的优化,高部位水平井距油层顶部距离的优化,以及水平井主支上钻分支井的效果研究等。在随钻过程中根据油藏模型的变化,及时进行井轨迹优化调整,确定最佳井位,为油田开发方案的决策提供了科学依据,使油田获得了最佳开发效果。

An application of integrated technique of geologic modeling and numerical simulation in LD 4-2 oilfield development

In LD 4-2 oilfield, new 3D seismic data was acquired and processed after its ODP coverall development planning was approved. Based on new refined structure interpretation and reservoir inversion, an integrated technique of geologic modeling and numerical simulation was used to build a more accurate reservoir model to replace the ODP model. Furthermore, the reservoir model was updated in time by using new log data during drilling. Before and during drilling, its development program was optimized and adjusted, such as several optimizations of well type, distance between side horizontal well to oil-water boundary and distance between center horizontal well to reservoir top, and drilling branches on the main horizontal intervals. While drilling, any wellbore path can be optimized and adjusted timely to reach the best well position according to variations in the reservoir model. This has provided a basis for making a decision of the field development program, leading to the best development results.