Abstract
Due to the short testing time and unstable productivity of horizontal wells in offshore fault-block oilfields, it is very important to evaluate the stable productivity of horizontal wells and the comprehensive correction coefficient of productivity by using limited horizontal well testing data. In this paper, the unsteady flow stage of horizontal wells is decomposed, and the productivity equations of vertical radial flow, linear flow and pesudo radial flow stage are obtained respectively. On this basis, the test time correction coefficients under different formation properties and horizontal well length conditions are plotted, unsteady productivity changes in horizontal wells under different fault conditions are compared and analyzed, the productivity correction coefficients under different fault conditions are obtained. The distance between well spacing fault and horizontal well is generally 0.2–1.0, its productivity correction coefficient is 0.68–0.85. The reliability of the charts are verified by testing data and production performance data of an offshore fault block oilfield. The methods and charts can effectively guide the determination of productivity of horizontal well testing method in offshore fault block oilfield.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call