Research on Fracture Characteristic in Reservoir of Qingshangkou
Formation，Yaoyingtai Oilfield

doi:10.11885/j.issn.1674-5086.2013.09.02.05

Abstract

Abstract:

Abstract：Yaoyingtai Oilfield is located in the central depression of Shongliao Basin，and the reservoir of Upper Cretaceous
in Qingshankou Formation in the 1∼301 blocks of Yaoyingtai Oilfield is fractured low-permeability reservoir and develop
fracture quite. This paper carries out systematical research about fractures through core observation，slices analysis，the imaging
logging data and carbon and oxygen isotope analysis. The study shows that the fracture developed in Qingshankou Formation
of Yaoyingtai Oilfield，and the highest degree of development in Qingshankou Formation is II sand set in No.1 section of
Qingshankou Formation. Other findings include that the length of fracture distributes between 5∼15 cm and the width distributes
between 0.1 1mm and the average density is 0.41 strips per meter. Most of fractures are full filled and the majority of fillings
is calcite with fracture dip between 75? ∼90? ，the orientation of fracture has mainly 4 groups which includes NWW（280?），
NNW（345?），NNE（18?），NEE（76?）. While the width of micro-fracture rests under 0.5 mm and filled or half-filled by
calcite and organics. The main fracture properties is shear fractures and other part of fracture properties is tension fracture. The
fractures has two develop stages，one is formed in the late tectonic movement of the nenjiang formation，and another is formed
in the late tectonic movement of MingShui formation.

Key words: Yaoyingtai Oilfield, Qingshankou Formation, fracture characteristics, reservoir, logging

Wang Shilin1, Qin Zhangjin2. Research on Fracture Characteristic in Reservoir of Qingshangkou
Formation，Yaoyingtai Oilfield[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.09.02.05.

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