高含硫气藏物质平衡方程通式的新推导

New deriving method for general expression of material balance equation of
gas reservoirs with high sulfur content

卞小强 杜建芬 李明军 杨廷玉 邓生辉

西南石油大学油气藏地质及开发工程国家重点实验室，四川 成都 610500 川气东送建设工程指挥部工程技术部，四川 达州 635000 吐哈油田公司钻采院，新疆 鄯善 838202

高含硫气藏是一种非常规的气藏，其物质平衡方程式与常规气藏物质平衡方程式有着一定的差异。高含硫气藏存在元素硫的析出与沉积，而常规气藏物质平衡方程通式并没有考虑硫沉积现象，所以不能完整地描述和预测高含硫气藏的开发动态。在考虑硫沉积等多种因素的基础上，从物质的量守恒角度推导出了高含硫气藏的物质平衡方程通式及压降方程通式。最后，利用新建的高含硫气藏物质平衡方程通式计算出某一含硫气藏的地质储量及压降变化，分析引起误差的原因，验证了模型的正确性和可靠性，为科学、安全、高效开发高含硫气田提供了一定的理论依据。

The gas reservoir with high sulfur content is a type of unconventional gas reservoirs. There are some differences between the
gas reservoir with high sulfur content and that without sulfur. There are the separation and deposition of sulfur in this type of gas
reservoir. But the sulfur deposition do not be considered in the genaral expression of material balance equation of conventional gas
reservoirs, which can not be used to describe and predict the production performance of gas reservoir of high sulfur content.
Wherefore it is of an importance significance to accurately derive the general expression of material balance equation of high sulfer
content. On the basis of considering sulfur deposition, the general expression of material balance equation of gas reservoirs with high
sulfur content and pressure decline formula are derived from mole conservation.Then geological reserves and pressure decline for
the gas reservoirs with high sulfur content are calculated by means of the new equations and the cause of error is analyzed. Finally,
the accuaracy and reliability of this method have been verified, which provides some theoretical reference for scientific development
of the gas reservoirs of high sulfer content