莺山地区营城组火山岩储层的裂缝预测

Prediction of fractures of volcanic reservior of Yingcheng Formation in Yingshan area

火山岩岩石种类复杂多样,空间分布状况不均衡,岩性横向变化快,火山岩油气藏的勘探难度很大。考虑火山岩的物性致密及受构造运动等因素的影响,通过改造火山岩可为油气提供良好的储集体,形成裂缝类油气藏。基于三维地震资料,采用相干体、倾角检测、蚂蚁体和曲率体属性方法对莺山地区进行裂缝预测。研究表明:研究区主要发育有三组拉张性质的断裂带,走向分别为北东向、北北东向和近南北向。裂缝预测结果与已有油井资料、解释成果和实际生产数据相比,该预测方法效果较好。

The exploration of volcanic rock reservoir is rendered more difficult by the underlying characteristics behind volcanic rocks, such as more complex and diverse types, unbalanced regional distribution, lithology laterally quick change.Despite the large density,volcanoes, subjected to the action of factors such as tectonic transformation, tend to produce the epigenetic cracks, contributing to an improved permeability condition of volcanic rocks.The modified volcanic rocks occur as good reservoirs for oil and gas, forming fracture reservoir.This paper introduces the prediction of fracture in Yingshan area in the study area, using 3D seismic data, together with coherence, dip detection, ant and curvature attributes.The study shows that developed in the study area are mainly three tensile fault zones with the trend of NNE, NE, and nearly NS.Comparing the prediction results with well data, interpretation results, production data, and the actual production data yields a better prediction result.