一种钻前定量预测地层压力的方法

钻前定量预测地层压力一直是油气勘探中的难题。以辽东湾地区为上要研究对象,利用声波时差,建立区域压实模式;用等效压实深度法并吸取声波时差检测地层压力的经验,在地震瞬时速度曲线上作钻前定量压力预测。经摸索和实践,取得了较满意的效果。此法简便易行,精度可靠。在钻井安全、降低成本、提高效益、预测产能上发挥较大作用,对区域异常高压及与油气藏的关系的研究,也将产生积极影响。

A METHOD TO PREDICT FORMATION PRESSURE QUANTITATIVELY BEFORE DRILING

It is a difficult problem in oil and gas exploration to predict formtion pressure before drilling quantitatively. Easy and dependable method has long been a target for oilman to seekfor. Liaodong Gulf is studied as a main object to predict formation pressure quantitativelybefore drilling with seismic instantaneous velocity curve regional compaction model and ve-locity of sound wave equivalent compaction method are used along with personal experienceto determine formation pressure by the method of time difference of acoustic wave. A satis-factory result has been obtained.This method is simple,convenient and dependable. It givesfavorable effects for safe drilling,reducing costs,increasing economic benefit and predictingoutput,and is helpful in studying the regional abnormal pressure and its relations to oil andaccumulation.