Determination of the labor requirement for development of production operations designed with the use of an automated design system

Translated from Khimicheskoe i Neftyanoe Mashinostroenie, No. 7, pp. 27–28, July, 1990.     

中国陆相页岩油研究进展与关键科学问题

中国陆相盆地页岩油资源丰富,是中国油气增储上产的重要战略接替领域.限于陆相盆地特殊复杂的地质条件,陆相页岩油的富集规律与主控因素不够明确,中国陆相页岩油勘探所面临的关键科学问题仍然有待进一步研究.通过充分调研国内外以细粒沉积、烃类赋存以及流体运移为重点研究页岩油的最新进展,结合中国陆相页岩油勘探进展,对比总结了陆相和海...     

EU seeks to speed-up adoption of biofuels

The European Union (EU) wants to see greater use of biofuels and has outlined plans to encourage their use. The take-up of biofuels has been slow in many countries and the European Commission is now considering mandatory targets. A decision on this is expected later this year.     

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

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