CHARACTERS OF A SPECIAL ROCK-FRACTURED RESERVOIR AND FACTORS OF CONTROLLING FRACTURED DEVELOPMENT AT QINGXI OIL FIELD IN JIUXI BASIN
酒西盆地青西油田白垩系泥云岩裂缝油藏特征和裂缝形成的控制因素

Rare is a special deep rock (muddy dolomite, dolomite mudstone, dolomite)-fractured oil reservoir at Qingxi Oil Field in Jiuxi Basin. In this reservoir which has lower porosity and permeability, fracture becomes major storable-permeable spaces and forms a good "autochthonous source and autochthonous reservoir" source-reservoir-seal assemblage. Furthermore, there is a great difference in wells production, acidization effect, etc. And the fractured formation factors which include structures, lithological characters, diageneses are studied. This study have certain theoretical meanings and practical values.