Method for improving recovery ratio of braided well pattern of hugely thick or multi-layer oil and gas reservoir

Abstract

The invention discloses a method for improving a recovery ratio of a braided well pattern of a hugely thick or multi-layer oil and gas reservoir, which improves the recovery ratio of the hugely thick or multi-layer oil and gas reservoir by designing the braided well pattern. The braided well pattern is designed through the following method: dividing a cubic development unit of the oil and gas reservoir; measuring a physical property parameter of the cubic development unit; calculating a well pattern design parameter according to the physical property parameter, wherein the well pattern design parameter includes a number of wells and a well bore track; and drilling a large-displacement horizontal well according to the well pattern design parameter. The step of dividing the cubic development unit of the oil and gas reservoir specifically includes: obtaining a boundary of the oil and gas reservoir through seismic volume data; obtaining a main layer series of development of the oil and gas reservoir according to a geological model established on the basis of a prospecting parameter; and establishing a cube with a largest volume in the main layer series of development, wherein the cube is the cubic development unit. The invention can effectively improve the recovery ratio of the hugely thick or multi-layer oil and gas reservoir.

Dependencies are inferred from the claim text.