成像测井资料在构造裂缝预测和评价中的应用

APPLICATION OF IMAGING WELL LOGGING DATA IN PREDICTION OF STRUCTURAL FRACTURE

成像测井的成本很高,油田中做成像测井的井数量十分有限,如何充分利用有限的成像测井资料进行构造裂缝的预测和评价是其中的重要课题。在对成像测井资料特征及其裂缝检测机理分析的基础上,结合构造解析和裂缝分布规律理论,以及在渤海湾盆地利用成像测井资料研究裂缝的具体实践,提出了利用成像测井资料进行储层构造裂缝预测和评价的思路和方法,包括如何利用成像测井资料来确定裂缝的成因、性质、形成时期及裂缝的纵向分布规律,预测裂缝的有效性、有效裂缝的方位和倾角。该方法的核心是利用构造解析方法,在正确认识和划分油气藏的构造演化阶段及其构造变形特征的基础上,对成像测井识别的裂缝与不同期次的构造变形进行科学的配套和分期。该套方法在渤海湾盆地区潜山裂缝油气藏的裂缝研究中得到了应用。

The amount of available imaging well logging data is very limited in oilfields due to their high cost. How to predict and evaluate structural fractures by fully using the limited imaging well logging data is a very important task. Based on analysis of the features of imaging well logging data and the theory of fracture detection, and in combination with the theory of structure analysis and fracture distribution, as well as the practice of fracture prediction in Bohai Bay Basin, the concepts and methods of predicting and evaluating structural fractures with imaging data are presented, such as determining the origin, nature, formation time and vertical distribution of fractures and predicting the effectiveness of fractures and their azimuths and dips. The core of these methods is the scientific matching and timing of the fractures recognized through imaging well logging with the structural deformations in different stages by using the structural analysis methods and on the basis of accurate understanding and division of structural evolution phases and the features of structural deformation. This set of methods has been applied in study of the fractures in the buried hill fractured reservoirs in Bohai Bay Basin.