Abstract To explore the flow mechanism of micro-remaining oil during cyclic waterflooding in low-permeability reservoir, displacement effect under conventional and different rounds was investigated by using a micro-visual experiment based on microfluidics model. The produced ratio types micro remaining quantified, major oils that can be applied effectively were analyzed. Moreover, investigated....

Workover of natural gas wells in deep carbonate reservoirs (DCRs) is facing multiple challenges such as fluid leakage, high temperature, and hydrogen sulfide (H2S) kick. Hence, well-killing fluids with satisfactory plugging ability, high-temperature tolerance, anti-H2S ability are necessary. In this study, we developed a multifunctional anti-hydrogen fuzzy-ball kill (AFKF) for preventing sour k...

Microbially induced calcite precipitation (MICP) is a new and sustainable technology which utilizes biochemical processes to create barriers by calcium carbonate cementation; therefore, this has potential be used for sealing leakage zones in geological formations. The complexity of current MICP models present computer power limit the size numerical simulations. We describe mathematical model su...

Interpolated contour maps drawn for aluminum, copper and molybdenum in downstream monitoring boreholes of water dam in Miduk Copper Complex and the values of pH, redox potential (Eh) and distance from water dam indicate different trends of variation and behavior of these three elements in downward groundwater resources. As these maps exhibit, aluminum is dominant in the most alkaline (pH = 9-11...

In China, for the limitation of land, many buildings intending to utilize ground source heat pump systems install “single-well” systems, which drill only one well for both the pumping and reinjection of the groundwater. A model of groundwater seepage and heat transfer for single-well ground source heat pump systems has been established and validated against the experiment conducted in Denmark. ...

A metabolic and physiological assessment was carried out in 14 patients who had undergone restorative proctocolectomy with ileal reservoir more than six months previously. The haemoglobin was normal in all but one and plasma electrolytes and serum albumin, calcium, phosphorus, and red cell folate estimations were normal in all. Five patients had low serum iron levels of whom one had an iron def...

Interpreting observations of seepage into underground openings is often complicated by evaporative potentials created by the necessity to ventilate the openings. Evaporation removes liquid from the seepage face. By doing so, it reduces both the likelihood of seepage onset and the seepage flux, and thus can enhance the perceived effectiveness of the capillary barrier. We modeled liquid-release t...

Earth dam is a structure as homogeneous or non-homogeneous forms for raising water level or water supply. Earth dam consist of different parts that one of the main parts is clay core. Choosing an optimal non permeable core which causes reduction of seepage through dam body and also being stable is necessary. The objective of this research is to optimize the geometry of earth dam clay core such ...

Landslides are caused by rainfall as one of the main factors. In order to study effect on physical and mechanical parameters landslides, a model colluvium landslide is created in laboratory conditions with silty clay, river sand, gravel, taking Shuping Three Gorges Reservoir area prototype. The artificial applied accumulation model, which steady for 60 h, then gravel soil taken out along differ...