Shale Wettability Characteristics via Air/Brines and Air/Oil Contact Angles and Influence of Controlling Factors: A Case Study of Lower Indus Basin, Pakistan.

Wettability is the fundamental parameter that influences the productivity of hydrocarbon reservoirs. The knowledge of this regarding shale formation is yet inadequate; thus, detailed analysis is essential for successful development of such reservoirs. The Early Cretaceous Sembar formations in the Lower Indus Basin, Pakistan, is considered as the key target for energy exploration; however, it exhibits large uncertainties due to the lack of data availability.

Hydrate as a by-product in CO leakage during the long-term sub-seabed sequestration and its role in preventing further leakage.

Subsurface sequestration of CO produced by industrial production is an effective way to control the excessive emission of greenhouse gases and alleviate the potential global warming. However, CO leakage is likely to occur in its long-term sub-seabed sequestration, posing a great threat to the marine environment and the marine ecology. Previous investigations mainly focused on the implementation of CO sequestration project, ignoring the subsequent potential environmental hazards such as CO leakage, let alone the post-treatment of these accidents.

Experimental investigation on hydrate dissociation in near-wellbore region caused by invasion of drilling fluid: ultrasonic measurement and analysis.

As we all know, development and utilization of clean energy is the only way for society to achieve its sustainable development. Although natural gas hydrates is a new type of clean energy, uncontrollable hydrate dissociation and accompanying methane leakage in drilling operation threaten drilling safety, as well as marine environment. However, the dissociation range of natural gas hydrates around wellbore cannot be reasonably determined in previous investigations, which may lead to the inaccurate estimation of borehole collapse and methane leakage.