High graphitization is responsible for low-resistivity shale development with poor reservoir quality. This paper provides an explanation of organic matter and determines the impact high graphite content on quality at Wufeng-Longmaxi Formation in Southern Sichuan Basin. Fine veins are frequently developed samples Ro > 3.5%, graphitized 25%, resistivity < 5 Ω•m, which dominated by three min...

Pyrite, as a characteristic mineral in organic-rich marine shale, is significant index for the interpretation of paleoredox conditions. In this study, based on drilling cores and focused ion beam-scanning electron microscopy (FIB-SEM), occurrence, diameter particle size distribution pyrites from 32 samples obtained Wufeng–Longmaxi Formation southeast Sichuan Basin were analyzed. The results sho...

With the increase of shale gas resource exploitation in our country during recent decades, situations low production, fast production decline rate, and flowback rate have been appearing field production. It is an urgent problem to be solved it therefore necessary study interaction reservoir detained fracturing fluid. In this paper, Longmaxi Formation samples Sichuan Basin were selected for a wa...

Permeability is one of the most important parameters to evaluate gas production in shale reservoirs. Because shale permeability is extremely low, gas is often used in the laboratory to measure permeability. However, the measured apparent gas permeability is higher than the intrinsic permeability due to the gas slippage effect, which could be even more dominant for materials with nanopores. Incr...

Systematic studies are quite rare on the gas-bearing property and its controlling factors of shallow Longmaxi shale outside Sichuan Basin. In a previous study, gas in place contents suit samples with depth range 362–394 m from well XK2, which was drilled Xishui area, Guizhou, southern China, were reported. present pore structure parameters irreducible water occurrence characteristics those samp...

Natural gas from shale reservoirs has been an important contributor for reserve growth, deliverability construction, and profits growth in natural industry the world. Hydraulic fracturing is commonly required commercial development, thus understanding present-day situ stress field greatly significant hydraulic efficient development reservoirs. However, there are no systematic investigations on ...

Nuclear magnetic resonance (NMR) is widely used to characterize the pore structure of rock. The nanoscale pores and fractures are well developed in a shale gas reservoir. closure nanopores caused by increase effective stress during production process could induce sensitivity nanopores, which has great impact on single-well productivity middle–late development stage. In this paper, samples from ...

Temporary plugging and diversion fracturing (TPDF) is a common method to increase production efficiency in shale gas reservoirs, but the growth law of fractures temporary mechanism are still unclear, which restricts further optimization schemes. Therefore, this study, series simulation experiments TPDF horizontal well with multi-clusters were carried out for Longmaxi Shale outcrop by using larg...