Abstract: An improved method to detect water influx using video monitoring of a cased wellbore is disclosed. A wireline well tool having a video camera and a light source is lowered into a selected borehole interval where water influx is suspected. The borehole fluid over the selected interval is displaced and replaced with either a water transparent mixture containing a viscosifying agent, a coloring agent and/or sufficient salt to increase mixture density; or a transparent water insoluble solvent. By use of either of these displacement fluids, the quality of video monitoring over the selected borehole interval for water influx, is enhanced.

Abstract: This invention relates to methods of treating subterranean formations. An impermeable plug is formed in a section of a cased and perforated borehole by transmitting from the surface a fluid resin comprising a polymerizable polymer and subsequently transmitting from the surface an acid catalyst which causes flash setting of the polymerizable polymer.

Abstract: Methods and apparatus are disclosed for reducing lifting costs in a producing hydrocarbon well by injecting produced water into a set of injection perforations located lower in the well borehole from a set of production perforations. A plunger pump and a cage-ball valve system are placed above a production packer which is located between the production and injection perforations. The valve system and pump are arranged to take produced water from above the packer and pump into the injection perforations only on the downstroke of the rod string activated plunger pump.

Abstract: Methods are disclosed for evaluating wet cutting from a well borehole to determine the hydrocarbon content of the earth formations penetrated by the well borehole. The wet cuttings to be measured are mixed with a polar hydrocarbon solvent which has both hydrophilic and hydrophilic properties. The solution of the solvent and cutting is filtered and then its emission (fluorescence) spectrum is measured by irradiating it with ultraviolet radiation excitation at wavelengths at which most petroleum compounds fluoresce. The hydrocarbon content of the sample wet cuttings is then determined by comparing its fluorescence emission to the emission fluorescence of known samples.

Abstract: A low cost zonal isolation technique for use in open hole well completions and workovers is disclosed. A production liner, tubing string, casing string or coiled tubing is provided with spaced apart pairs of sealing means having at least one hole drilled through the liner between each pair. The liner or other tubular is run in and placed across the production interval. Cement, resin or polymer gel is pumped into the annular between the liner and borehole wall through each of the holes between the liner and borehole wall through each of the holes between pairs of seals and allowed to harden or set up. The bore of the production liner is then drilled out and the production interval completed for well production or workovers, as desired.