新场气田致密碎屑岩气田水赋存分布规律研究

应用非稳定流理论求参的方法和思路，对新场气田蓬莱镇（J₃p）沙溪庙组（J₂s）气藏致密碎屑岩气田水的赋存与分布规律进行探索。引用美国水文地质教授Tempples从测井曲线上求参数的技术方法，系统求取了气田导水系数（T）、弹性释水系数-储水系数（S）等流体动力参数。结合沉积微相叠加圈定了沙溪庙组（J₂s）气藏产水预测区，认为新场气田沙溪庙组气藏地层水的产出，不仅受静态的地质环境制约，同时也受控于岩石颗粒骨架对上覆地层荷重的支撑强度等物性条件引起的弹性释出能力影响。指出气田沙溪庙组（J₂s）T值和S值与所获工业性天然气气流呈正相关关系。

OCCURRENCE AND DISTRIBUTION LOWS OF FORMATION WATER IN TIGHT CLASTIC ROCK RESERVOIRS OF XINCHANG GAS FIELD

The occurrence and distribution laws of formation water in J3P (Penglaizhen Formation, Upper Jurassic) and Jos (Shaximiao Formation, Middle Jurassic) tight clastic rock reservoirs of Xinchang gas field were investigated in light of the method of acquiring parameters by applying the theory of unsteady flow. The fluid dynamical parameters as water transmissibility coefficient (T) and elastic water-release factor-water storage factor (S) were-systematically acquired according to the technical method of acquiring parameters by log data which was quoted from Professor (hydrogcology) Tempples (USA). On the basis of predicting the water-producing areas in J2s reservoir in combination with the sedimentary microfacies superposition, it was considered that the production of formation water in J2s reservoir of Xinchang gas fiald is not only restrained by geological environment but also controlled by the elastic release ability caused by the support strength of rock matrix against overburden load; and, in Shaximiao Formation, the T and S are positively correlated to the possibility of obtaining commercial gas flow.