In recent times, particularly in the 21st century, there has been an alarming increase in the
demand for global energy, along with continuous depletion in conventional oil reservoirs …

Despite promising natural gas huff 'n'puff (HnP) field-pilot results, the dominant oil-recovery
mechanisms during this process are poorly understood. We conduct systematic natural-gas …

In this paper, we propose a novel analytical solution to predict the diffusion coefficient and
depth of natural gas penetration during soaking period of the cyclic gas injection process …

Changqing is the largest petroleum-producing field in China and one-third of its production
is attributed to the formations with permeability lower than 1 mD. Based on the recent …

Enhanced oil recovery in unconventional plays has been a focus of many E&P operators to
increase recovery factors. Conventional displacement-based secondary (eg water flooding) …

The drive for capital efficiency in unconventionals has encouraged operators to understand
subsurface interactions as effectively as possible. Combining multiple types of new and …

This is a follow-up paper to URTeC 539,“Compositional Tracking of a Huff-n-Puff Project in
the Eagle Ford”(the “original paper”). That paper documented compositional tracking …

The purpose of this paper is to (1) describe the mechanisms of gas-based enhanced oil
recovery (EOR) in tight unconventionals, and (2) emphasize the need for single-porosity …

Unconventional oil wells exhibit rapid decline in oil production rate and low ultimate oil
recovery, even though the lateral drilling and completion technology have advanced …

In this paper we emphasize the duality of fluid sampling:(1) fluid characterization; to collect
samples and measure pressure/volume/temperature (PVT) data that can be used to build …