As a kind of clean energy, shale gas has attracted much attention, and the exploration development potential resources in middle deep layers is huge. However, due to changeable geological burial conditions, complex geophysical responses are formed. Therefore, studying characteristics reservoir rock minerals their resistivity response helpful deepen understanding electrical reservoirs provide th...

In this study, twenty-six core shale samples were collected from the marine Lower Paleozoic in a well northeastern margin of Yangtze Platform. Analyses TOC content, mineral composition, major elements, along with trace and rare earth elements conducted on samples. The results used to investigate depositional conditions their effects organic matter accumulation preservation. Generally, sedimenta...

Abstract To investigate the characteristics of graphitized shale and influence organic matter graphitization on gas accumulation, Raman spectroscopy analysis, hydrocarbon generation simulation technique, reservoir physical property test, rock mechanics experiment, field emission scanning electron microscopy (FE-SEM) were carried out nongraphitized shales Longmaxi Formation in Changning area, so...

The operation experience of horizontal segment well in the southern Sichuan area within hard brittle shale layer Longmaxi formation demonstrates that high-density oil-based drilling fluid (HDOF) induced down-hole working condition, which is typically high-temperature, high-pressure and solid-phase-dominant, will directly impact stability wellbore wall. Focusing on bottom-hole osmotic pressure s...

The estimated ultimate recovery (EUR) of shale gas is an important index for evaluating the production capacity horizontal wells. Weiyuan field has wells with considerable EUR differentiation, which hinders prediction new Accordingly, 121 highly differentiated are used analysis. First, main control factors well identified via single-factor and multi-factor analyses, set as index. Subsequently, ...

The southern Sichuan Basin in China holds abundant shale gas resources; however, the bearing property shows great differences due to multiple stages of tectonic transformation. key revealing differential enrichment mechanism is explore thermal evolution characteristics during evolution. Therefore, taking Luzhou and Changning blocks as an example, which have obvious evolution, organic geochemica...

Temperature and pressure conditions of deep shale are beyond experiment range, the amount adsorbed gas is difficult to determine. To predict content shales under formation conditions, isothermal adsorption experiments model building were conducted on samples from Longmaxi Formation in China. A temperature-dependent based Langmuir equation proposed, which can be well-fitted by observed isotherms w...