As a major supplement to conventional fossil fuels, unconventional oil and gas resources
have received significant attention across the globe. However, significant challenges need …

A reasonable displacement method is essential to improve the oil displacement efficiency of
tight reservoirs. In this study, three different displacement methods were utilized on the tight …

In order to evaluate the displacement effect of four kinds of injection media in tight oil
sandstone, water, active water, CO2, N2 flooding experiments were carried out in laboratory …

Spontaneous imbibition plays a critical role in the two-phase flow in hydraulic fractures of
tight reservoirs. Although massive contributions have been devoted to addressing this issue …

Observations from field applications along with laboratory experiments have revealed the
significant potential of the surfactant-assisted spontaneous imbibition (SASI) as an …

Spontaneous imbibition has been demonstrated to be an important approach to enhance
the oil recovery of unconventional reservoirs after hydraulic fracturing. Adding chemical …

Understanding different fluids flow behavior confined in microscales has tremendous
significance in the development of tight oil reservoirs. In this article, a novel semiempirical …

Tight reservoirs are the focus of unconventional oil and gas resource development, but most
tight reservoirs exhibit complex pore structures, strong non-homogeneity, and limited water …

It is necessary to carry out experiments on cores with different degrees of crack development
when studying the seepage law of cracked reservoirs and evaluating cracks. The seepage …

As an important technology in improving oil recovery, CO 2 miscible flooding has achieved
great success in many oil fields. However, studies on CO 2 transport in porous media are …