Sulfate-reducing bacteria (Desulfomicrobium baculatum) is a group of anaerobic capable producing H2S gas, which sours crude oil, corrodes metal equipment, pipeline systems, and even forms biofilms that cause blockages reservoir, reducing the reception capacity pumped water in oil gas exploitation. Currently, biocides are mainly aldehydes or cyclic amines combined with cationic active substances...

Investigating multi cyclic gas (N2 and CO2) huff and puff have been conducted by long sandpack simulations with four different crude oils from Jiangsu oilfield. According to the production differential pressure and the production regularity during huff and puff, the production process was divided into three sections; the first one is free gas production section; the second section is low viscou...

The siliceous shale oil and gas in Nadanhada terrane has been studied through field geological survey, geochemistry sedimentary petrology. results show that the area belongs to a good reservoir, rock is brittle suitable for exploitation. abundance of organic matter relatively high. From west east from south north, increases maturity decreases. dynamic metamorphism thermal contact rocks are grad...

The low flow characteristics of heavy oil have brought many challenges to its exploitation. Looking for a cost-effective crude improver reduce the viscosity is currently most important challenge. Small-molecule improvers meet above requirements and become an ideal target oilfield production. In this article, three kinds barium salts alkylbenzene sulfonates with different lengths alkyl chains we...

Digital photogrammetry continues to evolve from specialist applications such as topographic mapping and is rapidly emerging as a highly accessible method for capturing geometric data. A range of general-purpose softcopy photogrammetric systems are now widely available to end users who are thus able to exploit images captured from an increasing number of high-resolution non-metric digital camera...

Sustainability assessment of food supply chains is relevant for global sustainable development. A framework is proposed for analysing fishfood (fish products for direct human consumption) supply chains with local or international scopes. It combines a material flow model (including an ecosystem dimension) of the supply chains, calculation of sustainability indicators (environmental, socio-econo...

In order to solve the problem of reciprocating motion in no beam supported mining machines, putting energy saving as a starting point in Coal Bed Methane (CBM) exploitation, this paper designs a completely non-circular gear automatic reversing vertical drainage machine based on the theory of non-circular gear transmission. In the field of CBM exploitation, the use of non-circular gears is an at...

This paper explores the use of divide and conquer algorithms to solve production optimization problems. Exploitation of inherent structure facilitates efficient formulations and solutions to production optimization problems that frequently appear in the upstream oil and gas sector. We present the daily production optimization, which gives rise to network optimization problems, and also add some...

Understanding molecular interactions between oil and reservoir matrix is crucial to develop a productive strategy for enhanced recovery. Molecular dynamics simulation has become an important method analyzing microscopic mechanisms of some static properties dynamic processes. However, modeling shale still challenging, due their complex features. Wettability, which the measurement oil-matrix inte...