新型水驱效果评价图版建立及应用

Establishment and application of evaluation chart of new water flooding effect

常涛 程大勇 李振鹏 刘春艳 刘斌

中海石油（中国）有限公司天津分公司，天津 300452

Tianjin Branch of CNOOC Ltd., Tianjin 300452, China

国内油气田大部分属于陆相碎屑岩沉积，天然能量普遍不发育，油田开发过程中常采取注水开发。因此，水驱开发效果评价成为油田生产的一项重点工作。由于简单、便捷，童氏图版被地质油藏工程师广泛应用，其理论基础为一维水驱油，而油田受储层非均质性、开发井网等因素影响，导致在实际生产过程中不会出现一维水驱的理想情况。针对童氏图版修正范围仅局限在储层条件、相渗变化、水驱常数等方面的问题，文中考虑了储层非均质性和开发井网的影响，将甲型曲线的半对数线性关系转换成更加符合实际的全对数关系，并利用公式推导，建立了新型水驱规律图版。通过与实际油田数据拟合发现，新图版相比童氏图版误差较小，更具实用性、推广性。

Since most of the oil and gas fields in China belong to terrestrial clastic rock deposits, and natural energy is generally insufficient, water injection is often used for oilfield development. Therefore, the water flooding development evaluation becomes a priority in oil field production. Due to its simplicity and convenience, Tong′s chart has been widely used by geological reservoir engineers, whose foundation is the one-dimensional water flooding theory. However, affected by the reservoir heterogeneity and development well patterns, there will be no ideal situation for one-dimensional water flooding in actual field. The revised range of Tong′s chart is only confined to reservoir conditions, relative permeability change, water drive constant and other factors. According to its limitations, the paper starts from the data laws of waterflooding field affected by reservoir heterogeneity and well patterns. The semilogarithmic linear relationship of the A-type curve is transformed into an actual full logarithmic relationship, and a new version of the waterflood law chart is established by the formula derivation in this paper. It is found by fitting with the actual oilfield data that the new chart error is smaller, which is more practical and more generalized.

10.6056/dkyqt201901015