官渡三维区沉积相与速度波阻抗关系研究与应用  

A STUDY AND APPLICATION OF THE RELATIONSHIP BETWEEN SEDIMENTARY FACIES AND VELOCITY AND IMPEDANCE IN GUANDU 3-D AREA

作　　者：禾苗[1] 赵宪生[1] 施泽进[1] 王长城[1] 

机构地区：[1]成都理工大学,四川成都610059

出　　处：《物探化探计算技术》2009年第5期466-471,410,共6页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家自然科学基金委员会与中国石油化工股份有限公司联合基金资助项目(40739903)

摘　　要：在官渡构造带六口井精细划分沉积微相的基础上,研究了各种沉积微相与地层速度,波阻抗参数的关系。经研究发现,本区沉积微相对地层速度及波阻抗有明显的控制作用。进一步研究它们之间的关系和变化规律,对沉积相进行统计分析,得到了沉积微相、岩性、速度和波阻抗的变化规律及数学表达式。由于该区有利油气藏的沉积相主要分布于边滩中,因此用地球物理参数预测沉积相是可能的。将这些参数剖面转换成沉积相剖面,可用沉积微相定量预测控制边滩砂体的分布,这对砂体十分发育的,以河流相沉积为主的工区,有重要的研究意义和实用价值。On the base of sedimentary micro facies detailed analysis of 6 wells in Guandu structure zone,it is carried out that a study on the relationship between various sedimentary micro facies and formation velocity and the relationship between various micro facies and wave impedance parameter.It is founded that sedimentary micro facies can obviously control the wave impedance and velocity,furthermore,we can learn the general pattern and their mathematical expressions of relationship variation of sedimentary facies with velocity and wave impedance.Because of the fact that the oil-gas accumulation in this area almost distributes in the concave flood plain,it is possible to predict the sedimentary facies by geophysical parameters.By converting these geophysical parameters sections into sedimentary facies sections,sedimentary micro facies can be used to forecast the distributing of concave flood plain sand body.The study has significant value on study on river facies deposition and it has also important practical value for the work area.

关 键 词：沉积相 波阻抗参数 边滩砂体 油气藏 

分 类 号：TE122.221[石油与天然气工程—油气勘探]