Study of the relationship between fractures and highly productive shale gas zones, Longmaxi Formation, Jiaoshiba area in eastern Sichuan

• DOI: 10.1007/s12182-018-0249-7
• Publication Date: 2018-08-06T05:27:34Z
• Authors: Yu-Feng Li; Wei Sun; Xi-Wu Liu; Dian-Wei Zhang; Yan-Chun Wang; Zhi-Yuan Liu
• Keywords: Shale Gas; Directional Drilling

Shale fractures are an important factor controlling shale gas enrichment and high-productivity zones in the Longmaxi Formation, Jiaoshiba area eastern Sichuan. Drilling results have, however, shown that fracture density does not have a straightforward correlation with productivity. Based on logging data, drilling seismic relationship between accumulation is investigated by integrating of experiments geophysical methods. The following conclusions been drawn: (1) Tracer diffusion tests indicate act as favorable channels for migration high-angle promote accumulation. (2) result azimuthal anisotropy prediction, system strength values 1 1.15 represents moderate development fractures, which considered to be high productivity, while systems larger than over-development fracture, may destruction reservoir preservation conditions.