Pulsed neutron technology has been widely used to monitor the remaining oil saturation of
the formation. In order to solve the problem of the remaining oil saturation and porosity of the …

Conventional proppants have the problem of proppant flowback and the inability to fully
distribute along long fractures. To solve these problems, coated proppants have emerged …

Accurate determination of the proppant placement and propped fracture height are important
for evaluating and optimizing stimulation strategies. A technology using non-radioactive …

CO 2 enhanced oil recovery (CO 2-EOR) project is of significance for CO 2 sequestration
and heavy oil recovery. Quantitative monitoring of CO 2 saturation (S CO2) is essential to …

Compensated porosity logging tool utilizing deuterium-tritium (DT) source shows a lower
sensitivity to the variation of formation porosity compared with that adopting Am-Be source …

With the increasing demand for the radioisotope-free operations, using pulsed neutron
gamma density (NGD) instead of gamma-gamma density (GGD) has become increasingly …

Neutron gamma density (NGD) logging is the most promising alternative to the traditional
density logging (GGD), which is of significance for resolving the radiation and safety issues …

Pulsed neutron gamma density logging (NGD) is of great significance for radioprotection
and density measurement in LWD, however, the current methods have difficulty in …

Azimuthal gamma-ray logging instruments play an important role in the geological steering
technology (geosteering) of directional drilling engineering. While their logging response …

Neutron gamma density measurement using dual gamma detectors (NGD-GD) is a popular
density measurement method. Compared with other NGD methods, the NGD-GD method …