中国东部含油气盆地隐蔽圈闭的地震反射特征及其勘探技术

随着地震勘探技术的发展,我国东部各含油气盆地的地震勘探,已逐渐摆脱了单纯以几何形态编制构造闯、寻找构造圈闭的做法,开始进入了应用各种地震讯息,全面研究构造、沉积和油气资源预测的阶段。在综合应用地震反射结构、振幅、频率、相位、速度、反射系数等讯息,解释沉积相,研究储集层和隐蔽圈闭等方面已取得了一定的效果。 

SEISMIC REFLECTION CHARACTERISTICS OF SUBTLE TRAPS IN PETROLIFEROUS BASINS IN EASTERN CHINA AND THE EXPLORATION TECHNIQUE APPLIED

On the basis of the seismic data available, this paper introduces the seismic characteristics of various subtle traps in eastern China and makes a preliminary approach to their distribution regularity and the related seismic exploration technique. It is proposed that these subtle traps can be divided into nine kinds of four types according to their seismic characteristics. The horizontal and vertical distribution patterns of various subtle traps are discussed in this paper. It is accepted that most of these subtle traps are distributed along four kinds of zone, i.e., the erosional unconformity zone, the overlap unconformity zone, the pinch lithological zone and the major fault zone. It is advisable to predict and search for subtle traps along these zones from now on.