METHOD OF DETERMINING MAXIMUM STRESS IN A WELL DRILLED IN A RESERVOIR

摘要

The present invention relates to a method of determining maximum stress in a well drilled in a reservoir, primarily a hydrocarbon reservoir, where there is at least one zone. Collapse regions are produced while drilling a well because the material of the wall of the well exceeds its maximum allowable stress, the material fractures and falls off, leaving a cavity. The caliper of the damaged zone can be measured by means of devices such as touch probes that extend radially until coming into contact with the physical wall of the well. Of all the variables referring to the state of stress of the rock, maximum allowable stress is not measurable, and it is a variable which is, despite being of enormous interest when designing operating plans in a hydrocarbon reservoir, very difficult to determine, and only methods that estimate the value thereof are known. The claimed method determines the maximum allowable stress based on the caliper measurements and other variables which in fact are determinable.