CN1773243A

CN1773243A - Carbonas content analyzer

Info

Publication number: CN1773243A
Application number: CN 200510015581
Authority: CN
Inventors: 董灵彦; 张俊玲; 杨涛; 李娟�; 马津生
Original assignee: Luhai Oil Apparatus System Engineering Co Ltd Tianjin
Current assignee: Luhai Oil Apparatus System Engineering Co Ltd Tianjin
Priority date: 2005-10-24
Filing date: 2005-10-24
Publication date: 2006-05-17

Abstract

The present invention relates to a lithologic analysis instrument, in particular, it relates to an analysis instrument capable of utilizing computer control to accurately analyze, measure and record carbonate content in the rock sample in the petroleum drilling application. Said analysis instrument includes main machine connected with sensor mounted on the reactor, and its is characterized by that it also includes computer which is connected with main machine and contains software: said main machine includes CPU, A/D 7705 chip, MAX876 chip and operation program solidified on the chip, in which MAX876 chip is connected with sensor, the sensor is connected with input interface of A/D7705 chip, the output interface of A/D7705 chip is connected with computer by means of communication interface of CPU, and the output interface of CPU is respectively connected with LED and NVROM.

Description

Carbonate content analyzer

Technical Field

The invention relates to a lithology analyzer, in particular to a carbonate content analyzer which can accurately analyze, measure and record rock samples by utilizing computer control in oil drilling application.

Technical Field

Carbonate content analyzers are one type of analyzer that evaluate the composition of rocks in a geological structure and provide reliable data. Because the carbonate rock stratum in China has wide distribution, multiple layers, large thickness and rich oil and gas display, and an industrial oil and gas reservoir is found, the carbonate content analyzer is widely applied to the field of logging. However, the existing carbonate content analyzer generally does not realize an interface with a computer, has a complex hardware structure, and needs an independent operation keyboard and a digital display unit, so that a host has a large volume, complex operation and high failure rate, and needs to be equipped with a printer of a specified model, so that the system configuration is limited, and the popularization and the use of the product are influenced.

Disclosure of Invention

In view of the above problems with the prior art, it is an object of the present invention to develop a carbonate content analyzer that can rapidly and accurately analyze, measure and record the carbonate content in a rock sample using computercontrol. The analyzer realizes the interface with the computer, makes full use of the resources of the computer, realizes the computer operation, and has the advantages of small host volume, light weight, simple and convenient operation, high reliability and flexible system configuration. The computer processing software is simple and easy to install and use, the human-computer interface is concise, the operation is easy, and the operation is convenient.

The technical scheme adopted by the invention is as follows: a carbonate content analysis appearance, it includes the host computer that links to each other with the sensor of installation on the reation kettle, its characterized in that: the computer is connected with the host and contains software, the host comprises a CPU, an A/D conversion 7705 chip, a precision voltage reference MAX876 chip and an operation program solidified on the chip, wherein the precision voltage reference MAX876 chip is connected with a sensor, the sensor is connected with an input interface of the A/D conversion 7705 chip, an output interface of the A/D conversion 7705 chip is connected with the computer through a communication interface of the CPU, and the output interface of the CPU is respectively connected with an LED (light emitting diode) and an NVROM (nonvolatile memory).

The invention is based on the chemical reaction formula:

the content of carbonate is determined by comparing the pressure generated by the carbon dioxide gas released from the rock sample and hydrochloric acid with the pressure generated by the carbon dioxide gas released from the rock sample and hydrochloric acid, using the pressure generated by the reaction of the standard calcium carbonate and hydrochloric acid in a compact reactor as a standard. The analysis result has important guiding function for lithology naming of the drilling stratumand comparison of the stratum.

The invention has the following characteristics:

1. the integration level of a host system is high, and the detection precision is high because a 16-bit serial A/D processor chip A/D7705 is adopted, the conversion precision is high, the speed is high, and the nonlinearity is small; and a precision voltage reference MAX876 is adopted to supply power to the pressure sensor, so that the measurement precision and stability are improved. The host machine comprises functions of data acquisition, data processing, communication and the like.

2. The computer operation is realized, the human-computer interface is simple, the operation is simple and convenient, the computer performs graphic processing, the data can be stored in large capacity, and the printer and the printing format can be set at will.

3. The operations of zero calibration, full calibration, printing, storage and the like can be selected, the analysis curve can be automatically displayed, the analysis result can be automatically displayed, and the historical curve and the data can be called.

4. The method has the advantages of high analysis speed, high precision, good reproducibility and convenient operation, and realizes the automation of the whole analysis process.

5. In the aspect of hardware design, in order to ensure that the instrument has small volume, light weight, compact structure, beautiful appearance and convenient carrying, the host adopts an LT-03 micro injection molding machine shell, fully utilizes the existing space, heat dissipation holes and installation mode, and is embedded with a high-density designed circuit board.

Drawings

Fig. 1 is a block diagram of the structure of the invention and is taken as an abstract figure.

Fig. 2 is a schematic block diagram of the host of fig. 1.

Fig. 3 is a diagram of a computer software work interface of fig. 1.

Fig. 4 is a flow chart of the present invention.

In the figure: 1. the system comprises a reaction kettle, 2. a sensor, 3. a host and 4. a computer.

The specific implementation mode is as follows:

the present invention work flow is described in detail with reference to fig. 4. The work flow comprises the following operations:

after a host (a singlechip system) and an upper computer are electrified, the singlechip system and the upper computer are initialized, the host waits for an upper computer command, if the host has the command, whether a 0 calibration command exists is judged, and if the host does not have the command, the host returns to wait for the upper computer command; when the host computer receives the parameters such as the input well depth and the like, the host computer sends an operation command;

after the host computer receives the 0 calibration command, the 0 state data is sampled, data processing is carried out, and the result is sent to an upper computer;

when the host computer does not receive the 0 calibration command, judging whether a full calibration command exists, if so, sampling full state data, processing the data, and sending the result to an upper computer;

when the host computer does not receive the full calibration command, judging whether a measurement program exists, if so, starting a second timer, sampling data at fixed time, processingthe data, and sending the result to an upper computer;

when the host computer does not receive the measuring program, returning to wait for the upper computer command;

and when the upper computer receives the measurement result transmitted by the host computer, displaying the data, the graph and the analysis result, and optionally printing an analysis report, thereby finishing the working process of the carbonate content analyzer.

Claims

1. A carbonate content analysis appearance, it includes host computer (3) that link to each other with sensor (2) of installation on reation kettle (1), its characterized in that: the carbonate content analyzer comprises a host (3), a computer (4) which is connected with the host (3) and contains software, wherein the host (3) comprises a CPU, an A/D conversion 7705 chip, a precision voltage reference MAX876 chip and an operation program solidified on the chip, the precision voltage reference MAX876 chip is connected with a sensor (2), the sensor (2) is connected with an input interface of the A/D conversion 7705 chip, an output interface of the A/D conversion 7705 chip is connected with the computer (4) through a communication interface of the CPU, the output interface of the CPU is respectively connected with an LED and an NVROM, and the work flow of the carbonate content analyzer comprises the following operations:

when the host computer receives the parameters such as the input well depth and the like, the host computer sends an operation command;

when the host computer does not receive the full calibration command, judging whether a measurement program exists, if so, starting a second timer, sampling data at fixed time, processing the data, and sending the result to an upper computer;

2. The carbonate content analyzer of claim 1, wherein: the host (3) adopts an LT-03 micro injection molding machine shell, and a high-density designed circuit board is embedded in the shell.