Advanced Slim Hole Logging Tools For Precise Mapping Of Hydrocarbons And Lowering Drilling Cost.
Authors: J. Joshua 
Published: May 2016

Manuscript
Proem For Advanced Slim Hole Logging.Give an overview of slim hole technologyDefine why it is only now gathering momentum over the decadesExplore the prospects for the future through slim hole logging.
Enlightenment of Advanced Slim Hole Logging.Slim Hole Logging : Drilling, evaluation and completion technology which allows fully engineered 6 1/4" and smaller holes at TD.Slimline well: Well with a cost-effective design around an optimal production conduit.Logging: Anything smaller than 4 3/4", or minimum 2 7/8". Tool OD 2 1/4".
Due To The Emergence Of Advanced Slim Hole Logging Technology (ASHL) with an advanced silhoutte and advances in drilling technology, there is a general preference to drill smaller diameter wells due to the comparative cost advantage, which also incubated for silhoutte of Precise MAPPING OF HYDROCARBONS
In recent times, this preference has led some wireline service companies to start to offer open hole formation evaluation services with slim tools having a diameter in the 2" to 2½" range. At present, most of the traditional petrophysical measurements can be acquired utilizing slim log tools. In addition, several" specialized" measurements, such as x dipole sonic, formation pressure testing, and resistivity imaging can also be acquired. The use of battery, computing memory technologies has allowed these tools to be deployed using a broader range of convenient techniques allows for reduced risk in the entry of slim hole wells. The provision of slim hole logging services has created an opportunity in the industry to leverage these tools for the economic development. Therefore, short horizontal sidetracks, well re-entries tests deeper horizons can be drilled and logged successfully.
Types Of ASHL (Advanced Slim Hole Logging):Shallow Logging Through HolesContinuous coring (Nanosensors)Downsized ConventionalCombination (Nanotechnology and Drilling)Small horizontal sidetracks (Nanobots Logging)Coiled tubing drilling
The Achievements Of ASHL Tool:• Some horizontal sidetracks with very less inches/hole sizes can be drilled under higher doglegs and logged successfully.• It is now possible to run well completions in newly drilled wells. A provision to subsequently log these wells with slim wireline logging tools to run across some old wells that were previously completed without a full formation evaluation logging suite.• Slim hole formation resistivity imaging services are now being provided, to aid in the identification of borehole freakout, fracture features that might affect the well's productivity determines oil mobility, and define oil-water contacts.
One Of My Idea From Nanotechnology and Petroleum Engineering is the Nanorobots could be used for logging purpose by circulating these nanorobots, which have nonomotors being driven by the ions in the mud or by mud circulation system. Expensive wireline tools are conventionally used in all types of wells to find important formation properties. I have come up with an idea of nanorobots for oil field logging, can be called as Nanologging Such that these nano robots can be used for ASHL to deviate into deep, slimmer holes with bent sub nanobots. Nanorobots can be constructed in a manner so that they possess sensors, on-board driving mechanism, computer(micro) as well as interface mechanism from where it can send instructions to computers from surface computers. Transmission to surface is by means of electromagnetic waves and detected by means of probes on surface. They facilitate wire-less communication and real time surveillance. Thus in comparison to the conventional logging named as laterolog they can save rig hours and can be more accurate and precise as compared to presently used techniques like logging while drilling and measurement while drilling. They can move with circulating mud or they can be made to propel or stop by the on-board computer instructions depending upon the measurement to be taken. They Can Also incorporate the data for Reservoir fluid saturation, Hydrocarbon Saturation, Petrophysical Parameters.