Interference well-test model for vertical well with double-segment fracture in a multi-well system

摘要

Single well pressure transient analysis ignores the impact from adjacent wells, while well interference has obvious effect on the pressure response. Additionally, fracture conductivity and half-length may decrease severely, leading to non-uniform closure along fractures. The interpreted fracture half-length could be much shorter than designed half-length if this phenomenon is ignored. Besides, well interference caused by adjacent wells in multi-well system could be mistaken as boundary effect in single-well model since type curves of these two circumstances are quite similar to each other, which could bring about unrealistic results compared with geologic characteristics. Therefore, distinguishing interference effect from boundary effect while considering non-uniform fracture closure becomes a major challenge.