Stretching Operating Envelop of New LWD High Resolution Resistivity Images in Oil Based Mud - First Application High Resolution Resistivity Images in Kuwait for Unconventional Reservoir.

Summary Najmah formation in Kuwait is known having rich kerogen rock that has potential of the hydrocarbon gas. The formation contains the mixtures limestone – dolomitic – clay and kerogen and has low to medium porosity. The fracture is the most important to be identified as the driver of the rock permeability. Borehole images is required to understand the fractures development and geological features in Najmah formation. However, upcoming development strategy in the field is high deviated well construction which limits the acquisition of the image logs with conventional wireline. The strategy to ensure the acquisition of downhole images logging with LWD are critical to be investigated while operation efficiency is meet. This paper will discuss a comparison between conventional electromagnetic resistivity images conveyed by wireline with the new generation multi-measurement of LWD imager in synthetic oil base mud in unconventional reservoir Najmah Kerogen formation. The main objective for the study is to have lesson learnt and assessing the quality of the multi-measurement LWD image’s data with given stretch operating condition. The solution of the minimizing the effect high mud attenuation to the images acquired due to variable stand-off and heavy mud weight will be discussed.