异常高温凝析气藏地层水高压物性实验研究

EXPERIMENTAL STUDY OF FORMATION WATER PROPERTIES AT HIGHT PRESSURE FOR ABNORMALLY-HIGH-TEMPERATURE CONDENSATE GAS RESERVOIR

大港千米桥潜山凝析气藏属典型的异常高温凝析气藏 ,地层水高压物性是开发这类气藏的一项非常重要的基础数据。给出了一种实验测定异常高温凝析气藏地层水高压物性的有效方法 ,利用该方法对气藏中板深 7井和板深8井地层水高压物性进行了实验测试。结果表明 ,板深 7井和板深 8井地层水中含气量和地层凝析气中饱和含水量较高 ,在储量计算和开发方案制定过程中必须考虑 ;板深 7井地层凝析气中含水量达到饱和 ,地层中可能存在游离水 ,板深 8井地层凝析气中含水量未达到饱和 ,地层中不存在游离水。结论为制定开发方案提供参考依据 ,进一步在生产中得到验证。

Formation water properties are fundamental parameters needed in developing such reservoirs. In the present work, an experimental method is proposed for determination of these properties. Using this method, tests were carried out on the formation water from wells of Banshen?7 and Banshen?8 under high pressures. The results indicate that both the dissolved gas content in the formation water and the saturation water content in the condensate gas are high for these two wells, which must be taken into consideration in reserve evaluation and development planning. In addition, the water content in the condensate gas in Well Banshen?7 has reached saturation level and thus free water may exist in the formation; on the other hand, water content in that in Well Banshen?8 is not in saturation and thus there is no free water exsisting in the formation. These results provide valuable reference data for development planning and have been proved valid in development production.