砂岩油田注水开发合理井网研究中的几个理论问题

本文在考察了油田开发历史上所形成的研究成果之后,提出并解决了应进一步研究的几个理论问题。在由许多互不连通或连通很差的含油砂体所组成的油层条件下,推导出井网对水驱采收率影响的理论表达式。应用本公式,再联系其它有关各方面,形成了井网研究的系统科学理论。同时还报导了这一理论的应用效果,论及了合理井网存在原因、确定方法,指出了由此引出的很有实用价值的新观点,并强调了“五点法”注水在一定条件下所具有的优越性。

SOME THEORITICAL CONSIDERATIONS ON OPTIMAL WELL PATTERN ANALYSIS IN A WATER FLOODING SANDY OIL RESERVOIR

After reviewing the works reported in the history of oilfied development, several theoritical consideration which should still be studied further in well pattern analysis, were proposed and solved in this paper. In the case of a reservoir composed of numerous disconnected or badly intereonnected sandbodies essential formulas are derived to express the effect of well pattarn on oil recovery by water flooding. Based on these a method of system science in pattern studies is proposed by integrating these results with those from other related aspects. This paper gives the effectiveness of its applications, indicates the existence of an optimal solution and its method of determination. Finally, some useful viewpoints are outlined, especially on the advantages of 5-spot method.