Log Derived Rock Properties For Use In Well Stimulation Design

Abstract

Well logs which present the full wave train of the acoustic signal show variations in both the compressive and shear wave arrivals with lithological changes. This information, along with elastic constants, which can be derived from the logs, can be used in the design techniques available for well stimulation planning. This information has been successfully applied in one area of California to select completion intervals that could be successfully stimulated at pressures below wellhead limitations. Additionally, pressures below wellhead limitations. Additionally, this data could be applied to the prediction of fracture height and of the fracture closure or sand embedment problem where productivity increases from well stimulation are only temporary. Introduction Optimization of well treatment over recent years has necessitated more exact input data regarding the formation characteristics. Design techniques have been developed which require specific rock properties; however, many of the properties used properties; however, many of the properties used are assumptions or average values obtained from limited core samples. Variations of geological factors under downhole conditions are readily observed on many types of logs; however, many of these variations are seldom taken into account in treatment design. Their influence on vertical fracture height is an important consideration for which there has been nothing very consistent in the method of prediction.

Case Histories - Combining Crossed Dipole Sonic Anisotropy and Oriented Perforating To Optimize Hydraulic Fracturing In the Burgos Basin - Reynosa Mexico

“…1,2,3,4,5,6,7,8,9,10 The candidate selection process evaluates the net-to-gross sand thickness ratio, reservoir pressure, and permeability for each zone. The net-to-gross ratio provides information on productive and non-productive fracture height, which is needed for inflow analysis.…”