测井约束反演技术在浊积岩油藏勘探中的应用

Application of Logging Constrained Inversion Technology in Oil Deposit Exploration in Turbidite

摘要:

东营凹陷是一个中新生代陆相断陷盆地,沙三段属于湖盆的深陷期,该区油气资源丰富,主力储集层为沙三中浊积砂体。研究的主要勘探对象是沙三段以浊积砂为主的岩性油藏。由于该区储集层是以沙三中三角洲前缘相沉积的浊积砂体为主,砂体在横向上变化较大,利用常规地震资料进行砂体追踪和描述有一定困难,因而在本工区开展了测井约束反演技术方法研究,以提高储层分辨率,效果明显。

Abstract:

Dongying depression is a Mesozoic-cenozoic continental facies fault basin. Third section of Shahejie formation belongs to deep-depression period of lake basin. Oil and gas resources are rich in this area. Trubidite in third section of Shahejie formation is major reservoir. Major exploration object is lithologic oil pool in third section of Shahejie formation. Trubidite sedimented in delta front in third seciton of Shahejie formation is major reservoir in this area, and sand body varied greatly vertically. If using normal seismic information, it is very difficult to trace and describe sand body. Thus, study on logging constrained inversion technology is carried out in this area, which has promoted reservoir discernibility and gained an evident effect.